161. Ryouyu Hirose, Yugo Kikkawa, Guangwei Cong, Rai Kou, Xuejun Xu, Kenichi Hitachi, Yamato Kitamura, Haruki Yaguchi, Noritsugu Yamamoto, Tadashi Nishikawa, Koji Yamada, Haruki Sanada, Katsuya Oguri, and Atsushi Ishizawa, "Generation of Short Optical Pulses at a 25-GHz Repetition Rate in Telecommunications Wavelengths by Using an Optical Frequency Comb with Silicon Modulators,'' Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR 2024), Incheon (Korea), 4-9 Aug 2024, Th1H-4.

160. Y. Kikkawa, A. Ishizawa, X. Xu, G. Cong, R. Kou, K. Yoshida; K. Hitachi, N. Yamamoto, T. Nishikawa, K. Yamada, H. Sanada, and K. Oguri, "Electro-optic-modulation Comb Generation Using a Silicon Modulator at 25-GHz Repetition Rate,'' Photonics & Electromagnetics Research Symposium (PIERS 2023), Prague (Czech Republic), 3-6 July 2023.

159. A. Ishizawa, Y. Kikkawa, R. Kou, G. Cong, X. Xu, T. Aihara, K. Hitachi, T. Tsuchizawa, N. Yamamoto, T. Nishikawa, K. Yamada, and K. Oguri, "Low-phase-noise Frequency-tunable Microwave and Millimeter-wave Generation Using an Electro-optic-modulation Comb,'' Photonics & Electromagnetics Research Symposium (PIERS 2023), Prague (Czech Republic), 3-6 July 2023. [Invited]

158. Yugo Kikkawa, Atsushi Ishizawa, Rai Kou, Xuejun Xu, Koki Yoshida, Tai Tsuchizawa, takuma Aihara, Tadashi Nishikawa, Guangwei Cong, Kenichi Hitachi, Noritsugu Yamamoto, Koji Yamada, Katsuya Oguri, "Sub-30-fs all-fiber electro-optic comb at 1.5 μm with 25-GHz repetition rate,'' Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR 2022), Sapporo (Japan), 31 July-5 Aug 2022, CThP6F-05.

157. Kouki Yoshida, Atsushi Ishizawa, Rai Kou, Xuejun Xu, Tai Tsuchizawa, Takuma Aihara, Yugo Kikkawa, Tadashi Nishikawa, Kenichi Hitach, Guangwei Cong, Noritsugu Yamamoto, Koji Yamada, Katsuya Oguri, "Enhancement of supercontinuum generation with multi-mode excitation in silicon-nitride waveguide,'' Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR 2022), Sapporo (Japan), 31 July-5 Aug 2022, CTuP6A-04.

156. Koki Yoshida, Atsushi Ishizawa, Rai Kou, Xuejun Xu, Tai Tsuchizawa, Takuma Aihara, Yugo Kikkawa, Tadashi Nishikawa, Kenichi Hitachi, Guangwei Cong, Noritsugu Yamamoto, Koji Yamada, Katsuya Oguri, "Dependence of supercontinuum light on incident laser polarization and dispersion-controlled SiN waveguides,'' International Symposium on Novel materials and quantum Technologies (ISNTT2021), Kanagawa(Japan), 14-17 December 2021, P1-35.

155. A. Ishizawa, T. Nishikawa. K. Hitachi, K. Yoshida, H. Gotoh, and K Oguri, "Tunable generation of low-phase-noise microwave signals,'' 2021 International Topical Meeting on Microwave Photonics, MWP 2021, 15-17 November 2021, Mo1.1 [Invited]

154. Atsushi Ishizawa, Kota Kawashima, Rai Kou, Xuejun Xu, Tai Tsuchizawa, Takuma Aihara, Koki Yoshida, Tadashi Nishikawa, Kenichi Hitachi, Guangwei Cong, Noritsugu Yamamoto, Koji Yamada, and Katsuya Oguri, "Simple method of carrier-envelope-offset locking with f-3f self-referencing solely by a dispersion-controlled silicon-nitride waveguide,'' 2021 Conference on Lasers and Electro-Optics Europe (CLEO Europe 2021), 21-25 June 2021, ED-P.2

153. Hiroki Mashiko, Akihiro Oshima, Ming-Chang Chen, Koji Asaga, Ikufumi Katayama, Jun Takeda, Tadashi Nishikawa, and Katsuya Oguri, "Supercontinuum spectral phase interferometry with isolated attosecond pulse,'' The 22nd International Conference on Ultrafast Phenomena 2020, 16-19 November 2020, Tu4B.6

152. Akihiro Oshima, Hiroki Mashiko, Ming Chang Chen, Koji Asaga, Tadashi Nishikawa, Ikufumi Katayama, Jun Takeda, and Katsuya Oguri, "Extreme ultraviolet interferometry with isolated attosecond pulse,'' The 9th Advanced Lasers and Photon Sources (ALPS2020), Yokohama(Japan), 20-24 April 2020, ALPS12-03.

151.  Kenya Hitomi, Atsushi Ishizawa, Kenichi Hitachi, Tomoya Akatsuka, Tadashi Nishikawa, and Hideki Gotoh, "Dispersion dependence of noise characteristics of an electro-optic-modulation comb," Photonics WEST OPTO 2020, San Francisco (USA), 1-6 Feb 2020, 11279-79.

150. S. Aragaki, K. Hitachi, A. Ishizawa, T. Nishikawa, H. Gotoh, and K. Oguri, "Propagation and Confinement of Acoustic Phonons in InGaAsP Multiple Quantum wells,'' International School and Symposium on Nanoscale Transport and phoTonics 2019 (ISNTT2019), Kanagawa(Japan), 18-22 November 2019, PTu19.

149. K. Hitomi, A. Ishizawa, K. Hitachi, T. Akatsuka, T. Nishikawa, and H. Gotoh, "Dispersion Adjustment of Electro-optic-modulation Comb,'' International School and Symposium on Nanoscale Transport and phoTonics 2019 (ISNTT2019), Kanagawa(Japan), 18-22 November 2019, PTu07.

148. K. Asaga, H. Mashiko, Y. Chisuga, A. Oshima, T. Nishikawa, I. Katayama, J. Takeda, H. Gotoh, and K. Oguri, "Actively Stabilized XUV Interferometer with Attosecond Time Resolution,'' International School and Symposium on Nanoscale Transport and phoTonics 2019 (ISNTT2019), Kanagawa(Japan), 18-22 November 2019, PTu05.

147. Hiroki Mashiko, Yuta Chisuga, Koji Asaga, Ikufumi Katayama, Jun Takeda, Tadashi Nishikawa, Katsuya Oguri, and Hideki Gotoh, " Attosecond Correlation with Actively Stabilized Extreme Ultraviolet Interferometer,'' 7th International Conference on Attosecond Science and Technology (ATTO2019), Szeged (Hungary), 1-5 July 2019.

146. Atsushi Ishizawa, Tadashi Nishikawa, Kenichi Hitachi, Kenya Hitomi, and Hideki Gotoh, "Ultra-Low Phase Noise Microwave Generation with 25-GHz Electro-Optics-Modulation Comb,'' 24th OptoElectronics and Communications Conference/International Conference Photonics in Switching and Computing 2019, OECC/PSC 2019, Fukuoka (Japan), 7-11 July 2019, MC1-3.

145. Tadashi Nishikawa, Akira Oohara, Shohei Uda, Atsushi Ishizawa, Kenichi Hitachi, Nathalie Picqué, and Theodor W. Hänsch, "Automatic Interpolation of 25 GHz Mode Spacing in Dual EOM Comb Spectroscopy,'' Conference on Lasers and Electro-optics (CLEO2019), San Jose (USA), 5-10 May 2019, SF1I.3.

144. Atsushi Ishizawa, Tadashi Nishikawa, Kenichi Hitachi, Kazutaka Hara, Kenya Hitomi, Tomoya Akatsuka, Tetsuomi Sogawa, and Hideki Gotoh, "Ultra-low noise microwave generation using carrier-envelope-offset signal of 25-GHz EOM comb,'' Conference on Lasers and Electro-optics (CLEO2019), San Jose (USA), 5-10 May 2019, SW4G.2.

143. Koji Asaga, Hiroki Mashiko, Yuta Chisuga, Ikufumi Katayama, Jun Takeda, Tadashi Nishikawa, Katsuya Oguri, and Hideki Gotoh, "Actively stabilized extreme ultraviolet attosecond interferometer,'' OPTICS & PHOTONICS International Congress 2019 (OPIC 2019), Yokohama (Japan), 22-26 April 2019, ALPS-17-02.

142. A. Ishizawa, T. Nishikawa, K. Hitachi, and H. Gotoh, "Generation of ultralow-phase-noise millimeter-wave signal using an electro-optics-modulation comb,'' 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC 2019), New Delhi (India), 9-15 March 2019, Th-DO8-6. [Invited]

141. Kenichi Hitachi, Mayu Someya, Atsushi Ishizawa, Tadashi Nishikawa, Hideki Gotoh, "Characterization of Acoustic Phonons in InGaAsP MQW by Asynchronous Optical Sampling,'' Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR 2018), Hong Kong (China), 29 July-3 Aug 2018, W4B.5.

140. Kenya Hitomi, Atsushi Ishizawa, Kenichi Hitachi, Tadashi Nishikawa, Hideki Gotoh, Tetsuomi Sogawa, and Kazutaka Hara, "Simple method to lock an optical frequency comb to an ultra-stable laser without an RF signal generator,'' Pacific Rim Conference on Lasers and Electro-Optics (CLEO-PR 2018), Hong Kong (China), 29 July-3 Aug 2018, W2F.5.

139. Katsuya Oguri, Kento Toume, Yuya Hasegawa, Hiroki Mashiko, Keiko Kato, Yoshiaki Sekine, Hiroki Hibino, Akira Suda, Tadashi Nishikawa, and Hideki Gotoh, “Dirac electron dynamics of graphene related systems towards petaherz-scale solid state technology” Shanghai-Tokyo Advanced Research Symposium on Ultrafast Intense Laser Science (STAR9), Tochigi(Japan), 24-27 May 2018.

138. A. Ishizawa, T. Nishikawa, K. Hara, K. Hitachi, T. Sogawa, and H. Gotoh, "Carrier-envelope-offset locking of 25-GHz EOM comb based on a free-running CW Laser Diode,'' Conference on Lasers and Electro-optics (CLEO2018), San Jose (USA), 13-18 May 2018, SM4L.5.

137. Y. Hasegawa, K. Oguri, K. Kato, T. Nishikawa, and H. Gotoh, “Excitation Power Dependence of Nonequilibrium Carrier Relaxation Dynamics in Graphene,” International School and Symposium on Nanoscale Transport and phoTonics 2017 (ISNTT2017), Kanagawa(Japan), 13-17 November 2017, PWe20.

136. K. Hara, K. Hitachi, A. Ishizawa, T. Nishikawa, and H. Gotoh, “Evaluation of 2f-to-3f Self-referencing Interferometer Using Dual-pitch PPLN Ridge Waveguides,” International School and Symposium on Nanoscale Transport and phoTonics 2017 (ISNTT2017), Kanagawa(Japan), 13-17 November 2017, PTu46.

135. Masayuki KAKEHATA, Tatsumi KOYAMA, Hidehiko YASHIRO, Tadashi NISHIKAWA, Kenji TORIZUKA, "Laser-induced periodic surface structures on Yttria-stabilized Zirconia ceramics by cross-polarized femtosecond double-pulse irradiations,'' International Conference on Laser Ablation (COLA 2017), Marseille (France), 3-8 September 2017, P.220.

134. K. Hitachi, K. Hara, O. Tadanaga, A. Ishizawa, T. Nishikawa, and H. Gotoh, “Reduced pulse energy for frequency stabilization with a dual-pitch periodically poled lithium niobate ridge waveguide” Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC 2017), Munich(Germany), 25-29 June 2017, ED-P.6

133. A. Ishizawa, T. Nishikawa, T. Goto, K. Hitachi, T. Sogawa, and H. Gotoh, "Generation of Low-Phase-Noise Millimeter Waves in a Wide Frequency Range by Using a Frequency Comb based on Electro-Optics-Modulators,'' Frontiers in Optics 2016, Rochester (USA), 17-21 October 2016, FTu5C.5

132. K. Hara, K. Hitachi, O. Tadanaga, T. Ishizawa, T. Nishikawa, T. Sogawa, and H. Gotoh, "Reduction of pulse energy for frequency stabilization with dual-pitch periodically poled lithium niobate waveguides,'' 29th IEEE Photonics Conference (IPC 2016), Hawaii (USA), 2-6 October 2016, WE1.3.

131. K. Kato, Y. Hasegawa, T. Nishikawa, K. Oguri, H. Gotoh, "Time-domain study for Fano resonance in p-type Si,'' International Conference on Ultrafast Phenomena (UP 2016), Santa Fe (USA), 17-22 July 2016, UW4A.5.

130. M. Kakehata, T. Takahashi, H. Yashiro, A. Oyane, A. Ito, T. Nishikawa, K. Torizuka, " Wavelength dependence of femtosecond laser-induced periodic surface structures on yttria-stabilized zirconia,'' 17th International Symposium on Laser Precision Microfabrication (LPM2016), Xi’an (China), 23-27 May 2016, We1-O-4.

129. K. Hitachi, A. Ishizawa, O. Tadanaga, T. Nishikawa, H. Mashiko, T. Sogawa, and H. Gotoh, "Frequency stabilization in a collinear 2f-to-3f self-referencing interferometer with a dual-pitch PPLN ridge waveguide,'' The International Symposium on Nanoscale Transport and Technology (ISNTT 2015), Atsugi (Japan), 17-20 November 2015, PWe02.

128. Katsuya Oguri, Takanobu Tsunoi, Keiko Kato, Hidetoshi Nakano, Tadashi Nishikawa, Kouta Tateno, Tetsuomi Sogawa, Hideki Gotoh, "High-order harmonic source based femtosecond core-level photoelectron spectroscopy for carrier transport dynamics on semiconductor surface", The 23th Annual International Conference on Advanced Laser Technologies (ALT’15), Faro (Portugal) 7-11 September 2015, LM-I-17. [Invited]

127. Katsuya Oguri, Takanobu Tsunoi, Keiko Kato, Hidetoshi Nakano, Tadashi Nishikawa, Kouta Tateno, Tetsuomi Sogawa, and Hideki Gotoh, "Dynamical photo-Dember effect studied with femtosecond core-level photoelectron spectroscopy based on high-order harmonic source", The 9th International Symposium on Ultrafast Surface Dynamics (USD9), Lake Biwa (Japan) 25-29 May 2015.

126.  Atsushi Ishizawa, Tadashi Nishikawa, Takahiro Goto, Kenichi Hitachi, Tetsuomi Sogawa, Hideki Gotoh, "Low-Phase-Noise Millimeter-Wave Signal Generator assisted with Frequency Comb based on Electro-Optics-Modulators,'' Conference on Lasers and Electro-optics (CLEO2015), San Jose (USA), 10-15 May 2015, STh4N.6.

125.  Kenichi Hitachi, Atsushi Ishizawa, Osamu Tadanaga, Hiroki Mashiko, Tadashi Nishikawa, Tetsuomi Sogawa, Hideki Gotoh, "A Robust 2f-to-3f Collinear Interferometer with a Dual-Pitch Periodically Poled Lithium Niobate Ridge Waveguide,'' Conference on Lasers and Electro-optics (CLEO2015), San Jose (USA), 10-15 May 2015, SW4G.3.

124.  Takahiro Goto, Atsushi Ishizawa, Rai Kou, Tai Tsuchizawa, Nobuyuki Matsuda, Kenichi Hitachi, Tadashi Nishikawa, Koji Yamada, Tetsuomi Sogawa, Hideki Gotoh, "Octave Spanning Frequency Comb Generation in a Dispersion-Controlled Short Silicon-Wire Waveguide with a Fiber Laser Oscillator,'' Conference on Lasers and Electro-optics (CLEO2015), San Jose (USA), 10-15 May 2015, SW4G.1.

123.  Tadashi Nishikawa, Atsushi Ishizawa, Ming Yan, Hideki Gotoh, Theodor Hänsch, Nathalie Picqué, "Broadband Dual-comb Spectroscopy with Cascaded-electro-optic-modulator-based Frequency Combs,'' Conference on Lasers and Electro-optics (CLEO2015), San Jose (USA), 10-15 May 2015, SW3G.2.

122.  Atsushi Ishizawa, Tadashi Nishikawa, Ming Yan, Guy Millot, Hideki Gotoh,  Theodor Hänsch, Nathalie Picqué, "Optical Frequency Combs of Multi-GHz Line-spacing for Real-time Multi-heterodyne Spectroscopy,'' Conference on Lasers and Electro-optics (CLEO2015), San Jose (USA), 10-15 May 2015, SW1G.7.

121.  Kenichi Hitachi, Atsushi Ishizawa, Tadashi Nishikawa, Hiroki Mashiko, Osamu Tadanaga, Masaki Asobe, Tetsuomi Sogawa, and Hideki Gotoh, "A collinear 2f-to-3f self-referencing interferometer with a dual-pitch PPLN ridge waveguide,'' Conference on Lasers and Electro-optics (CLEO2014), San Jose (USA), 8-13 June 2014, JW2A.106.

120.  Atsushi Ishizawa, Takahiro Goto, Hidetaka Nishi, Nobuyuki Matsuda, Rai Kou, Kenichi Hitachi, Tadashi Nishikawa, Koji Yamada, Tetsuomi Sogawa, and Hideki Gotoh, "On-Chip Supercontinuum Generation in a Dispersion-Controlled Silicon-Wire Waveguide,'' Conference on Lasers and Electro-optics (CLEO2014), San Jose (USA), 8-13 June 2014, ATu3P.3.

119. Kenichi Hitachi, Atsushi Ishizawa, Tadashi Nishikawa, Masaki Asobe, and Tetsuomi Sogawa, "Highly stabilized carrier-envelope-offset frequency of an Er-doped mode-locked fiber laser with a dual-pitch PPLN waveguide,'' The International Symposium on Nanoscale Transport and Technology (ISNTT 2013), Atsugi (Japan), 26-29 November 2013, PTu13.

118. Kenichi Hitachi, Atsushi Ishizawa, Tadashi Nishikawa, Masaki Asobe, and Tetsuomi Sogawa, "High-efficiency carrier-envelope offset locking in a 2f-to-3f self-referencing interferometer with a dual-pitch PPLN ridge waveguide,'' Conference on Lasers and Electro-optics (CLEO2013), San Jose (USA), 9-14 June 2013, CF1G.6.

117.  Tadashi Nishikawa, Miho Yamazaki, Nuremy Binti, Atsushi Ishizawa, Kenichi Hitachi, Katsuya Oguri, and Tetsuomi Sogawa, "Wide range wavelength and repetition rate tunable tens of GHz sub-picosecond pulse source,'' Conference on Lasers and Electro-optics (CLEO2013), San Jose (USA), 9-14 June 2013, JTh2A.23

116.  Atsushi Ishizawa, Tadashi Nishikawa, Akira Mizutori, Hidehiko Takara, Atsushi Takada, Tetsuomi Sogawa, Masafumi Koga, "Phase Noise Characterization of a 25-GHz-Spaced Optical Frequency Comb from a Phase-Modulated Laser,'' Conference on Lasers and Electro-optics (CLEO2013), San Jose (USA), 9-14 June 2013, CTu1I.7.

115. Kenichi Hitachi, Atsushi Ishizawa, Tadashi Nishikawa, Masaki Asobe, and Tetsuomi Sogawa, "2f-3f Optical Wavelength Conversion Device with PPLN waveguides," 2012 International Conference on Solid State Devices and Materials (SSDM 2012), Kyoto (Japan), 25-27 Sep 2012, A-3-4.

114.  K. Oguri, H. Nakano, Y. Okano, T. Nishikawa, K. Kato, A. Ishizawa, T. Tsunoi, H. Gotoh, K. Tateno, and T. Sogawa, " Ultrafast diagnostics of photo-excited processes in solid using femtosecond laser-based soft X-ray pulse sources,'' 8th International Conference on Photo-Excited Processes and Applications, Rochester (USA), 12-17 August 2012, FI 1. [Invited]

113.  K. Oguri, T. Tsunoi, K. Kato, H. Nakano, T. Nishikawa, H. Gotoh, K. Tateno, and T. Sogawa, "Surface Carrier dynamics on Semiconductor Studied with Femtosecond Core-Level Photoelectron Spectroscopy Using Extreme Ultraviolet High-Order Harmonic Source,'' XVIIIth International Conference on Ultrafast Phenomena (UP 2012), Lausanne (Switzerland), 8-13 July 2012, TUE.PII.39.

112.  Atsushi Ishizawa, Tadashi Nishikawa, Akira Mizutori, Hidehiko Takara, Hidetoshi Nakano, Tetsuomi Sogawa, Atsushi Takada, Masafumi Koga, "Sub-100-fs optical pulse generation at 1-GHz repetition rate with an externally phase-modulated continuous wave laser diode,'' Ultrafast Optics 2011 (UFO VIII), Monterey (USA), 26-30 Sep 2011, Tu12.

111.  K. Oguri, H. Nakano, K. Kato, T. Nishikawa, A. Ishizawa, H. Gotoh, K. Tateno, and T. Sogawa, " High-order harmonic photoelectron spectroscopy system towards measuring attosecond electron dynamics on solid surfaces,'' 3rd International Conference on Attosecond Physics (ATTO3), Sapporo (Japan), 6-8 July 2011, WP-86.

110.  Katsuya Oguri, Keiko Kato, Tadashi Nishikawa, Atsushi Ishizawa, , Hideki Gotoh, Kouta Tateno, Tetsuomi Sogawa, and Hidetoshi Nakano, " Observation of photovoltage effect on GaAs surface with ultrafast high-order harmonic photoelectron spectroscopy,'' The Fifth International Conference on the Science (STAC5), Yokohama (Japan), 22-24 June 2011, 22pHsO05.

109.  Masafumi Koga, Atsushi Takada, Atsushi Ishizawa, Tadashi Nishikawa, Hidehiko Takara, "Proposal of Optical Frequency Synchronized Photonic Network Based on Carrier-Envelop Offset Locked Frequency Comb," Korea-Japan Workshop on Beyond 100G,Jeju island (Korea), 1-3 June 2011. [Invited]

108.  H. Nakano, K. Oguri, A. Ishizawa, and T. Nishikawa, " High-order harmonics of carrier-envelope phase controlled few-cycle laser pulse for probing dynamics of photo-excited solid surface, " International Symposium on Ultrafast Intense Laser Science (ISUILS 9), Maui, Hawaii (USA), 9-13 Dec 2010, Session III-2. [Invited]

107.  H. Nakano, K. Oguri, A. Ishizawa, and T. Nishikawa, " Ultrafast time-resolved spectroscopy using X-ray pulses driven by femtosecond laser pulses,'' 6th Asian Symposium on Intense Laser Science (ASILS 6), Beijing (China), 13-16 Oct 2010, S4-2. [Invited]

106.  Tadashi Nishikawa, Atsushi Ishizawa, Akira Mizutori, Hidehiko Takara, Hidetoshi Nakano, Atsushi Takada, Masafumi Koga, " Approach to achieving a wider mode spacing carrier-envelope phase-locked frequency comb at telecommunications wavelength region,'' The 2th Shanghai Tokyo Advanced Research Symposium on Ultra Intense Laser Science (STAR2), Xiamen (China), 27-28 May 2010, (Technical Digest, pp. 13). [Invited]

105.  Atsushi Ishizawa, Tadashi Nishikawa, Akira Mizutori, Hidehiko Takara, Shinichi Aozasa, Atsushi Mori, Hidetoshi Nakano, Atsushi Takada, Masafumi Koga, "New Approach to Achieving a Carrier-Envelope Phase-Locked Frequency Comb with 25-GHz Mode Spacing,'' Conference on Lasers and Electro-optics (CLEO2010), San Jose (USA), 16-21 May 2010, CWJ4.

104.  K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Dynamic of femtosecond laser ablation plume studied with ultrafast x-ray absorption fine structure imaging," in The International High-Power Laser Ablation Conference (2010HPLA), Santa Fe (USA), 18-11 April 2010, 39 (Technical Digest, pp. ?). [Invited]

103.  Hidetoshi Nakano, Katsuya Oguri, Yasuaki Okano, Tadashi Nishikawa, "Dynamics of femtosecond-laser-ablated liquid aluminum nanoparticles probed by means of spatiotemporally resolved X-ray absorption fine structure spectroscopy," 10th annual Conference on Laser Ablation (COLA 2009), Singapore, 22-27 November, 2009, ID:152. [Invited]

102.  Tadashi Nishikawa, Yoshiki Nishida, Masaki Asobe, Feng-lei Hong, Akira Ozawa, and Theodor Wolfgang Hänsch, "Efficient 494-mW Sum-frequency Generation of 589-nm Light by Using a Periodically Poled LiNbO₃ Ridge Waveguide,'' The European Conference on Lasers and Electro-Optics (CLEO/Europe2009), München (Germany), 14-19 June 2009, CD6.5.

101.  A. Ishizawa, T. Nishikawa, S. Aozasa, A. Mori, Y. Hiraki, O. Tadanaga, M. Asobe, H. Nakano, "Efficient Carrier Envelope Offset Locking for a Frequency Comb by Modifying a Collinear f-to-2f Interferometer,'' Conference on Lasers and Electro-optics (CLEO2009), Baltimore (USA), 31 May -5 June 2009, CTuK6.

100.  K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Dynamic imaging of femtosecond laser ablation plume by using laser-generated soft X-ray," in The 21th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS2008), Newport Beach (USA), 9-13 Nov 2008, ThX1 (Technical Digest, pp.864-865). [Invited]

99.    A. Ishizawa, T. Nishikawa, H. Nakano, S. Aozasa, A. Mori, O. Tadanaga, and M. Asobe, " Demonstration of locking carrier envelope offset by using low pulse energy,'' Conference on Lasers and Electro-optics (CLEO2008), San Jose (USA), 4-9 May 2008, CThU4.

98.    H. Nakano, K. Oguri, Y. Okano, and T. Nishikawa, "Spatiotemporally-resolved XAFS measurement using femtosecond laser plasma soft x-ray," The third Asian Symposium on Intense Laser Science (ASILS3), Cameron Highlands (Malaysia), 2-6 July 2007, I-26. [Invited]

97.    K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Temperature measurement of aluminum nanoparticles in an expanding femtosecond laser ablation plume," 2nd Asian Workshop on Generation and Applications of Coherent XUV and X-ray Radiation (AWCXR), Wako (Japan), 30 May – 1 June, 2007, P-21.

96.    H. Nakano, K. Oguri, Y. Okano, and T. Nishikawa, "Dynamic imaging of femtosecond laser ablation plume by spatiotemporally-resolved XAFS technique," 2nd Asian Workshop on Generation and Applications of Coherent XUV and X-ray Radiation (AWCXR), Wako (Japan), 30 May – 1 June, 2007, I-11. [Invited]

95.    Katsuya Oguri, Yasuaki Okano, Tadashi Nishikawa, and Hidetoshi Nakano, " Temperature Measurement of Aluminum Nanoparticles in Femtosecond Laser Ablation Plume Using Spatiotemporally Resolved XAFS Technique,'' Conference on Lasers and Electro-optics (CLEO2007), Baltimore (USA), 6-11 May 2007, CThA3 (Technical Digest, pp.674-675).

94.    H. Nakano, K. Oguri, Y. Okano, T. Nishikawa, "Femtosecond laser-induced ablation processes observed by picosecond-time-resolved XAFS using femtosecond laser-produced plasma soft x-ray pulses," The Second Canada-Japan SRO-COAST Symposium on Ultrafast Intense Laser Science, Quebec (Canada), 3-5 March 2007, Session 2. [Invited]

93.    K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Ejection of liquid aluminum nanoparticles in femtosecond-laser-ablation plume observed by　spatiotemporally-resolved XAFS," International Symposium on Ultrafast Intense Laser Science (ISUILS5), Lijiang (China), 29 Nov - 2 Dec 2006, P-18.

92.    H. Nakano, K. Oguri, Y. Okano, T. Nishikawa, "Femtosecond laser-induced melting and ablation processes observed by picosecond-time-resolved XAFS using femtosecond laser-produced plasma soft x-ray pulses," International Symposium on Ultrafast Intense Laser Science 5 (ISUILS5), Lijiang (China), 29 Nov - 2 Dec 2006, Session 6. [Invited]

91.    Yasuaki Okano , Katsuya Oguri , Takeshi Kai , Ryou Fujii , Hiroaki Nishimura , Tadashi Nishikawa , and Hidetoshi Nakano, "Spatial evolution of femtosecond-laser-induced aluminum plasma observed by picosecond time-resolved x-ray absorption spectroscopy," 48th Annual Meeting of the Division of Plasma Physics of The American Physical Society (DPP06),  Philadelphia (USA), 30 Oct– 3 Nov 2006, NO3.00014.

90.    K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Dynamic imaging system for measuring L-shell absorption structures of aluminum in femtosecond laser ablation plume," in The 19th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS2006), Montreal (Canada), 29 Oct – 2 Nov 2006,  ThU2 (Technical Digest, pp.891-892).

89.    H. Nakano, K. Oguri, Y. Okano, T. Nishikawa, "Time-resolved XAFS measurements using femtosecond-laser produced plasma X-rays," 1st Canada-Japan SRO-COAST Symposium, Tokyo (Japan), 7-8 July 2006, Session V-3. [Invited]

88.    Y. Okano, K. Oguri, T. Nishikawa, and H. Nakano, "Spatiotemporal observation of a laser-ablation plume using femtosecond-laser-based X-rays," 1st Canada-Japan SRO-COAST Symposium, Tokyo (Japan), 7-8 July 2006, P05.

87.    K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Observation of rapid laser induced melting of silicon by time-resolved EXAFS measurement," 1st Canada-Japan SRO-COAST Symposium, Tokyo (Japan), 7-8 July 2006, P04.

86.    H. Nakano, K. Oguri, Y. Okano, T. Nishikawa, "Picosecond time-resolved XAFS measurements using femtosecond laser-produced plasma x-rays as a probe," XII International Conference on Laser Optics (LO’2006), St. Petersburg (Russia), 26–30 June 2006, ThR5-22. [Invited]

85.    H. Nakano, K. Oguri, and T. Nishikawa, "Picosecond time-resolved XAFS measurements using femtosecond laser-produced plasma soft x-rays", International Chemical Congress of Pacific Basin Societies (PACIFICHEM 2005), Honolulu (USA), 15-20 Dec 2005, PHYS-0059. [Invited]

84.    K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Development of Ultrafast Spatially-Resolved X-ray Absorption Spectroscopy System Using Laser-Produced-Plasma Source," International Symposium on Ultrafast Intense Laser Science 4 (ISUILS4), Hawaii (USA), 10-14 Dec 2005, P-20.

83.    H. Nakano, Y. Okano, K. Oguri, and T. Nishikawa, "Spatiotemporal evolution of soft X-ray absorption in an ablated particle cloud created by a 100-fs laser pulse on an aluminum target," in 18th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS2005), Sydney (Australia), 23-27 October 2005,  WU5 (Technical Digest, pp. 625-626).

82.    Katsuya Oguri, Yasuaki Okano, Tadashi Nishikawa, Hidetoshi Nakano, "Observation of ultrafast bond-length expansion at the initial stage of laser ablation by picosecond time-resolved EXAFS," Joint Conference on Ultrafast Optics V and Applications of High Field and Short Wavelength Sources XI (UFO/HFSW 2005), Nara (Japan), 25-30 Sept 2005, Tu2-5.

81.    Yasuaki Okano, Katsuya Oguri, Tadashi Nishikawa, Hidetoshi Nakano, " Femtosecond-laser-induced ablation of an aluminum target probed by space- and time-resolved soft x-ray absorption spectroscopy," Joint Conference on Ultrafast Optics V and Applications of High Field and Short Wavelength Sources XI (UFO/HFSW 2005), Nara (Japan), 25-30 Sept 2005, Tu2-4.

80.    Y. Okano, K. Oguri, T. Nishikawa, and H. Nakano, "Space- and time-resolved soft x-ray absorption spectroscopy of aluminum plasma induced by femtosecond-laser ablation," 8th International Conference on Laser Ablation (COLA '05), Banff (Canada), 11-16 Sept 2005, Fr-O39.

79.    Y. Okano, K. Oguri, T. Nishikawa, and H. Nakano, "Soft x-ray imaging for picosecond time-resolved absorption spectroscopy using a femtosecond-laser-induced plasma source," International Quantum Electronics Conference 2005 (IQEC 2005), Tokyo (Japan), 11-15 July 2005, QThG2-3 (Technical Digest, pp. 1230-1231).

78.    H. Nakano, K. Oguri, and T. Nishikawa, "Picosecond time-resolved XAFS measurements of optically excited silicon by using femtosecond-laser-plasma soft x-rays," 14th International Laser Physics Workshop (LPHYS'05), Kyoto (Japan), 4-8 July 2005, 2.2.5. [Invited]

77.    K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Time-resolved x-ray absorption fine structure measurement of laser-melted Si with femtosecond laser-produced-plasma x-ray source," Quantum Electronics and Laser Science Conference (QELS 2005), Baltimore (USA), 22-27 May 2005, QFC4 (Technical Digest, pp. 751-753).

76.    H. Nakano, K. Oguri, and T. Nishikawa, "Picosecond time-resolved XAFS measurements using femtosecond laser-produced plasma soft x-rays," COAST Symposium on Laser Based Ultrashort VUV and X-ray Sources and Their Applications, Tokyo (Japan), 29 March 2005, 7. [Invited]

75.    H. Nakano, K. Oguri, and T. Nishikawa, "High-order harmonic pulse characterization by femtosecond ionization dynamics of singly charged ions of rare gas," 1st Asian Workshop on Generation and Applications of High-Order Harmonics, Daejon, (Korea), 23-25 Feb 2005, I-2. [Invited]

74.    H. Nakano, K. Oguri, and T. Nishikawa, "Picosecond time-resolved absorption spectroscopy using femtosecond laser-produced plasma soft x-rays," 2nd International Symposium on Technologies and Applications of Photoelectron Micro-Spectroscopy with Laser-based VUV Sources, Tsukuba (Japan), 1-3 Feb 2005, O-extra.

73.    T. Nishikawa, K. Oguri, and H. Nakano, "EUV and x-ray conversion efficiency improvement from laser produced plasma using nanostructure-array targets," 2nd International Symposium on Technologies and Applications of Photoelectron Micro-Spectroscopy with Laser-based VUV Sources, Tsukuba (Japan), 1-3 Feb 2005, O-15.

72.    H. Nakano, K. Oguri, and T. Nishikawa, "Time-resolved measurements using ultrafast soft x-ray sources based on femtosecond laser," International Symposium on Atoms, Molecules, and Clusters in Intense Laser Fields 2 (ISAMCILS2), Tokyo (Japan), 24-25 Jan 2005, Session II-3. [Invited]

71.    Y. Okano, K. Oguri, T. Nishikawa, and H. Nakano, "Spatially resolved soft x-ray spectroscopy of femtosecond-laser-induced plasmas," Photonics WEST 2005, San Joes (USA), 22-27 Jan 2005, 5714-38.

70.    H. Nakano, K. Oguri, and T. Nishikawa, "Bright ultrafast EUV sources for time-resolved absorption measurements," The 17th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS 2004), Rio Grande (Puerto Rico), 7-11 Nov 2004, ThJ1 (Technical Digest, pp. 817-818). [Invited]

69.    K. Oguri, Y. Okano, T. Nishikawa, and H. Nakano, "Time-resolved observation of melted Si by ultrafast absorption spectroscopy using femtosecond laser-produced-plasma x-rays," Third International Symposium on Ultrafast Intense Laser Science 3(ISUILS3), Palermo (Italy), 16-20 Sept 2004, P-20.

68.    A. A. Andreev, J. Limpouch, H. Nakano, and T. Nishikawa, "X-ray line emission from femtosecond laser-produced plasma created on a multilayered target," International Symposium on Optical Science and Technology, SPIE 49th Annual Meeting, Denver (USA), 2-6 Aug 2004, 5537-03.

67.    O. Klimo, J. Limpouch, H. Nakano, and T. Nishikawa, "K-a emission from multilayer targets irradiated by ultrashort laser pulses," 31st European Physical Society Conference on Plasma Physics, London (UK), 28 Jun – 2 July 2004, P4.001.

66.    H. Nakano, K. Oguri, and T. Nishikawa, "Temporal characterization of femtosecond soft x-ray pulse using optical field-induced ionization dynamics in noble gas'', The fourth Asian Pacific Laser Symposium (APLS2004), Yongpyong(Korea), 1-7 March 2004, ThE-A3. [Invited]

65.    K. Oguri, T. Nishikawa, T. Ozaki, and H. Nakano, "High-order harmonic pulse characterization by using femtosecond ionization dynamics of singly charged ions of rare gas'', The 16th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS2003), Tucson (USA), 26-30 October 2003, MP4 (Technical Digest, pp. 163-164).

64.    T. Nishikawa, T. Suzuki, Y. Watanabe, O. Zhou, and H. Nakano, "Efficient water-window x-ray pulse generation from femtosecond-laser-produced plasma by using a carbon nanotube target'', Application of High Field and Short Wavelength Sources X (HFSW10), Biarritz (France), 12-15 October 2003, TuB5 (Technical Digest, pp. 74).

63.    H. Nakano, T. Nishikawa, and A. A. Andreev, "K-shell x-ray line emission from femtosecond laser-produced plasma created on a multilayered target'', International Symposium on Ultrafast Intense Laser Science 2: Technology, Trends, Propagation and Interaction (ISUILS2), Quebec (Canada), 27-29 September 2003, 16. [Invited]

62.    K. Oguri, T. Nishikawa, and H. Nakano, "Sampling measurement of femtosecond soft x-ray pulse shape using transient state of singly charged ions during sequential ionization in krypton'', International Symposium on Ultrafast Intense Laser Science 2: Technology, Trends, Propagation and Interaction (ISUILS2), Quebec (Canada), 27-29 September 2003, 14.

61.    H. Nakano, T. Nishikawa, K. Oguri, and N. Uesugi, "Femtosecond laser plasma x-ray for time-resolved spectroscopy'', 7th International Conference on Optics (ROMOPTO2003), Constanta (Romania), 8-11 September 2003, I.I.3. [Invited]

60.    T. Nishikawa, T. Suzuki, Y. Watanabe, O. Zhou, and H. Nakano, "Enhanced water-window x-ray pulse generation with carbon nanotubes target'', The 10th International Workshop on Femtosecond Technology (FST2003), Makuhari (Japan), 16-17 July 2003, WP-53.

59.    K. Oguri, T. Nishikawa, and H. Nakano, "Demonstration of method for measuring soft x-ray-pulse shape using transient state of singly charged ion during sequential ionization'', The 10th International Workshop on Femtosecond Technology (FST2003), Makuhari (Japan), 16-17 July 2003, WA-4.

58.    H. Nakano, T. Nishikawa, K. Oguri, "Time-resolved absorption spectroscopy using ultrashort soft x-ray pulse from femtosecond laser-produced plasma'', 9th Conference on Laser Optics (LO2003), St. Petersburg (Russia), 30 June - 4 July 2003, WeR5-06. [Invited]

57.    Katsuya Oguri, Hidetoshi Nakano, Tadashi Nishikawa, and Tsuneyuki Ozaki, "Soft x-ray pulse duration measurement with sub-100-fs resolution using ultrafast resonance absorption change caused by optical-field-induced ionization,'' 23rn annual Conference on Lasers and Electro-optics (CLEO2003), Baltimore (USA), 1-6 Jun 2003, CMZ2

56.    Hidetoshi Nakano, Tadashi Nishikawa, and A. A. Andreev, "Optimum Femtosecond K-shell X-Ray Line Emission from Femtosecond Laser-produced Plasma,'' The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS2002), Glasgow (Scotland), 10-14 November 2002, ThJ2 (Technical Digest, pp. 708-709).

55.    Hidetoshi Nakano, Katsuya Oguri, Tadashi Nishikawa, and Naoshi Uesugi, "Time-resolved Absorption Spectroscopy Using Femtosecond Laser-produced Plasma Soft X-ray Pulse,'' JAERI Symposium on Control of Lasers for Strong Field Phenomena, Kyoto (Japan), 12-13 September 2002, 16. [Invited]

54.    Hidetoshi Nakano, Katsuya Oguri, and Tadashi Nishikawa, "Time-resolved absorption spectroscopy using ultrashort soft x-ray pulse from femtosecond laser-produced plasma,'' JST International Symposium; Control of Molecules in Intense Laser Fields, Tokyo (Japan), 9-10 September 2002, D-2 (Technical Digest, D-2). [Invited]

53.    Tsuneyuki Ozaki, Katsuya Oguri, Tadashi Nishikawa, and Hidetoshi Nakano, "Harmonic generation resulting from the interaction of high intensity femtosecond laser pulse with solid surface plasma,'' The 9th International Workshop on Femtosecond Technology (FST2002), Tsukuba (Japan), 27-28 June 2002, FD-14, (Technical Digest, pp. 198).

52.    Katsuya Oguri, Tadashi Nishikawa, and Hidetoshi Nakano, "Measuring the sub-100-fs duration of a high-order-harmonic pulse in the soft x-ray region using optical-field-induced ionization,'' The 9th International Workshop on Femtosecond Technology (FST2002), Tsukuba (Japan), 27-28 June 2002, FC-16, (Technical Digest, pp. 168).

51.    Tadashi Nishikawa, Hidetoshi Nakano, Masashi Nakao, Naoshi Uesugi, Kazuyuki Nishio, and Hideki Masuda, "X-ray generation enhancement mechanism from femtosecond-laser-produced plasma with nanostructure-array targets,'' 8th International Conference on X-ray Lasers (ICXRL2002), Aspen (USA), 27-31 May 2002, Session XV 11:40-12:00 (Technical Digest).

50.    Tsuneyuki Ozaki, Katsuya Oguri, Tadashi Nishikawa, and Hidetoshi Nakano, "Characterization of surface plasma in surface harmonic experiments using satellite structures in the reflected spectrum,'' 8th International Conference on X-ray Lasers (ICXRL2002), Aspen (USA), 27-31 May 2002, P.41 (Technical Digest).

49.    J. Q. Lin, Hidetoshi Nakano, Tadashi Nishikawa, Tsuneyuki Ozaki, and Katsuya Oguri "Guiding high intensity femtosecond laser pulses in a capillary for a soft X-ray laser,'' Conference on Lasers and Electro-optics (CLEO2002), Long Beach (USA), 19-24 May 2002, CMW3 (Technical Digest, pp. 107-108).

48.    J. Q. Lin, Hidetoshi Nakano, Tadashi Nishikawa, Tsuneyuki Ozaki, and Katsuya Oguri "Propagation of intense ultra-short laser pulses in capillary and its application in soft X-ray laser,'' The International Symposium on Science of Super-Strong Field Interactions, Hayama (Japan), 13-15 March 2002, P11 (Technical Digest, pp. 71).

47.    Hidetoshi Nakano, Katsuya Oguri, and Tadashi Nishikawa, "Time-resolved probing of aluminum plasma created by a 100-fs laser pulse using a picosecond soft x-ray pulse,'' The 14th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS 2001), San Diego (USA), 11-15 November 2001, WP3 (Technical Digest, pp. 525-526).

46.    Hidetoshi Nakano, Tadashi Nishikawa, Katsuya Oguri, and Naoshi Uesugi, "Time-resolved soft x-ray absorption spectroscopy using femtosecond laser plasma x-rays,'' International Conference Advanced Laser Technologies 2001 (ALT'01), Constanta (Romania), 11-14 September 2001, LMP9, (Technical Digest, pp. 45-46). [Invited]

45.    Katsuya Oguri, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Ultrashort soft-x-ray pulse-shape measurement using optical field ionization dynamics in noble gas,'' SPIE's 46th Annual Meeting, San Diego (USA), 29 July - 3 August 2001, 4504-05.

44.    Tadashi Nishikawa, Hidetoshi Nakano, Masashi Nakao, Naoshi Uesugi, Kazuyuki Nishio, and Hideki Masuda, "X-ray pulse generation characteristics from laser-produced plasma on nanocylinder-array target,'' The 4th Pacific Rim Conference on Lasers and Electro-Optics, Makuhari (Japan), 15-19 July 2001, MC1-5, (Technical Digest, Volume I, pp. 68-69).

43.    Naoshi Uesugi, Hidetoshi Nakano, Tadashi Nishikawa, and Katsuya Oguri, "Short X-ray pulse generation towards time-resolved spectroscopy,'' XVII International Conference on Coherent and Nonlinear Optics (ICONO2001), Minsk (Belarus), 26 June - 1 July 2001, SuB1. [Invited]

42.    Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Optimum enhancement of K-shell line emission from aluminum plasma created by a pair of 100-fs laser pulses,'' The 8th International Workshop on Femtosecond Technology, Tsukuba (Japan), 28-29 June 2001, TC-39, (Technical Digest, pp. 131).

41.    Katsuya Oguri, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Method for measuring ultrashort soft X-ray-pulse shape using transient state in optically ionized gas,'' The 8th International Workshop on Femtosecond Technology, Tsukuba (Japan), 28-29 June 2001, TC-38, (Technical Digest, pp. 130).

40.    Tadashi Nishikawa, Hidetoshi Nakano, Naoshi Uesugi, Masashi Nakao, Kazuyuki Nishio, and Hideki Masuda, "Nanocylinder-array structure dependence of enhanced x-ray generation from femtosecond-laser-produced plasma,'' The 8th International Workshop on Femtosecond Technology, Tsukuba (Japan), 28-29 June 2001, TA-3, (Technical Digest, pp. 16).

39.    Hidetoshi Nakano, Tadashi Nishikawa, Katsuya Oguri, and Naoshi Uesugi, "Efficient x-ray short pulse generation from femtosecond laser-produced plasma for pump-probe spectroscopy,'' IEEE Lasers and Electro-Optics Society 2000 Annual Meeting (LEOS2000), Rio Grande (Puerto Rico), 13-16 November 2000, WBB2, (Technical Digest, pp. 635). [Invited]

38.    Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Efficient soft x-ray pulse generation from femtosecond-laser-produced plasma and its application to time-resolved spectroscopy,'' 6th Conference on Optics (ROMOPTO 2000), Bucharest (Romania), 4-7 September 2000, I.I.1., (Program, pp. 7-8). [Invited]

37.    Tadashi Nishikawa, Hidetoshi Nakano, and Naoshi Uesugi, "Efficient generation of ultrashort x-ray pulses from femtosecond laser-produced plasma toward time-resolved x-ray spectroscopy,'' The 7th International Workshop on Femtosecond Technology, Tsukuba (Japan), 29-30 June 2000, TA-2, (Technical Digest, pp. 15). [Invited]

36.    Hidetoshi Nakano, Peixiang Lu, Tadashi Nishikawa, and Naoshi Uesugi, "X-ray short pulse generation from femtosecond-laser produced plasma and its application in pump-probe spectroscopy,'' 10th Conference on Laser Optics, St. Petersburg (Russia), 26-30 June 2000, TuB1-10, (Program, pp. 20). [Invited]

35.    Tadashi Nishikawa, Hidetoshi Nakano, Naoshi Uesugi, Masashi Nakao, Kazuyuki Nishio, and Hideki Masuda, "X-ray generation from femtosecond-laser-produced plasma on nanostructure-array targets,'' 7th International Conference on X-Ray Lasers, Saint-Malo (France), 18-23 June 2000, P50, (Technical Digest, pp. 112).

34.    Naoshi Uesugi, Hidetoshi Nakano, Tadashi Nishikawa, and Peixiang Lu, "Efficient soft X-ray generation from femtosecond-laser-produced plasma and its application to time resolved spectroscopy,'' 7th International Conference on X-Ray Lasers, Saint-Malo (France), 18-23 June 2000, I23, (Technical Digest, pp. 48). [Invited]

33.    Hidetoshi Nakano, Tadashi Nishikawa, Naoshi Uesugi, J. Limpouch, and A. A. Andreev, "Femtosecond laser-produced plasmas as x-ray sources,'' XXVI European Conference on Laser Interaction with Matter (ECLIM2000), Prague (Czech Republic), 12-16 June 2000, Fr/O3/1/I, (Technical Digest, pp. 122). [Invited]

32.    Peixiang Lu, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Commercial TW femtosecond laser-driven table-top x-ray lasers,'' International Forum on Advanced High-Power Lasers and Applications (AHPLA '99), Osaka (Japan), 1-5 November 1999, 3886-39, (Technical Digest, pp. 66).

31.    Naoshi Uesugi, Hidetoshi Nakano, Tadashi Nishikawa, "Efficient soft x-ray generation from femtosecond-laser-produced plasma,'' The Pacific Rim Conference on Lasers and Electro-Optics, Seoul (Korea), 30 August - 3 September 1999, WK2, (Technical Digest, pp. 228-229). [Invited]

30.    Tadashi Nishikawa, Hidetoshi Nakano, Naoshi Uesugi, and Masashi Nakao, "Enhanced x-ray generation from femtosecond-laser-produced plasma by using a nanohole-alumina target,'' The Pacific Rim Conference on Lasers and Electro-Optics, Seoul (Korea), 30 August - 3 September 1999, TuD3, (Technical Digest, pp. 39-40).

29.    Hidetoshi Nakano, Tadashi Nishikawa, Peixiang Lu, and Naoshi Uesugi, "Generation of short x-ray pulse from femtosecond laser-produced plasma and its application in spectroscopy,'' International Conference on Laser Physics and Quantum Optics, Shanghai (China), 25-28 August 1999, (Technical Digest, 25/8 16:00-16:25). [Invited]

28.    Peixiang Lu, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "XUV Emission from TW Femtosecond Laser Produced Plasma Column in Gases,'' International Conference on Laser Physics and Quantum Optics, Shanghai (China), 25-28 August 1999, (Technical Digest, 25/8 15:10-15:25).

27.    Hidetoshi Nakano, Peixiang Lu, Tadashi Nishikawa, and Naoshi Uesugi, "Time-resolved soft x-ray absorption measurement near silicon L_II,III edge using femtosecond laser-produced plasma x-rays,'' The 6th International Workshop on Femtosecond Technology, Makuhari (Japan), 13-15 July 1999, TA-15, (Technical Digest, pp. 135).

26.    Peixiang Lu, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Demonstration of femtosecond laser driven low-charged oxygen soft x-ray laser,'' The 6th International Workshop on Femtosecond Technology, Makuhari (Japan), 13-15 July 1999, WC-19, (Technical Digest, pp. 79).

25.    Hidetoshi Nakano, Yoshinori Goto, Peixiang Lu, Tadashi Nishikawa, and Naoshi Uesugi, "Pump-probe measurement of silicon L_2,3 absorption edge change induced by femtosecond laser pulses,'' Applications of High Field and Short Wavelength Sources VIII (HFSW '99), Potsdam (Germany), 27-30 June 1999, WC1, (Technical Digest, pp. 116). [Invited]

24.    Peixiang Lu, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Soft x-ray laser in low-charged nitrogen ions by optical-field-induced ionization, International conference on lasers '98, Tucson (USA), 7-11 December 1998, FC-8.

23.    Tadashi Nishikawa, Hidetoshi Nakano, and Naoshi Uesugi, "Enhancement of soft x-ray emission from femtosecond laser-produced plasma with a rectangular groove target,'' 6th International Conference on X-Ray Lasers, Kyoto (Japan), 31 August - 4 September 1998, P2-38, (Technical Digest, pp. 156).

22.    Peixiang Lu, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Design of a 1TW/100fs-laser-driven Ne-like S x-ray laser at 60.8 nm,'' 6th International Conference on X-Ray Lasers, Kyoto (Japan), 31 August - 4 September 1998, P1-16, (Technical Digest, pp. 83).

21.    Hidetoshi Nakano, Peixiang Lu, Tadashi Nishikawa, and Naoshi Uesugi, "Prepulse effects on x-ray emission in keV and sub-keV ranges from Al plasma produced by femtosecond Ti:sapphire laser pulses,'' 6th International Conference on X-Ray Lasers, Kyoto (Japan), 31 August - 4 September 1998, O-26, (Technical Digest, pp. 53).

20.    Naoshi Uesugi, Hidetoshi Nakano, and Tadashi Nishikawa, "Efficient narrow-band soft x-ray generation from femtosecond laser plasma by Nd-doped glass,'' ICONO '98, Moscow (Russia), 29 Jun - 3 July 1998, TuN4.

19.    Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Soft X-ray emission from femtosecond laser plasma created on a neodymium-doped glass surface,'' 5th International Workshop on Femtosecond Technology, Tsukuba (Japan), 12-13 February 1998, Session 4-61, (Technical Digest, pp. 109).

18.    Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Cluster effects in soft x-ray pulse generation from femtosecond laser-produced plasma on a metal-doped glass target,'' SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, San Diego (USA), 27 July-1 August 1997, 3157-03.

17.    Tadashi Nishikawa, Hidetoshi Nakano, Naoshi Uesugi, and Tadashi Serikawa, "The effects of porous layer on the soft X-ray generation from femtosecond laser produced plasma with a porous silicon target,'' The Pacific Rim Conference on Lasers and Electro-Optics, Makuhari (Japan), 14-18 July 1997, P27, (Technical Digest, pp. 168-169).

16.    Hidetoshi Nakano, Tadashi Nishikawa, Naoshi Uesugi, Tsutomu Yanagawa, and Youichi Kurokawa, "Dependence of soft x-ray emission from femtosecond laser-produced plasma on the size of clusters in a gold-doped alumina target,'' The Pacific Rim Conference on Lasers and Electro-Optics, Makuhari (Japan), 14-18 July 1997, P26, (Technical Digest, pp. 168).

15.    Hidetoshi Nakano, Tadashi Nishikawa, Naoshi Uesugi, Tsutomu Yanagawa, and Youichi Kurokawa, "Soft X-ray emission from femtosecond laser-produced plasma using gold-doped alumina,'' International Workshop on Hard-Photon Technology, Tsukuba (Japan), 28 January 1997, C-30, (Technical Digest, pp. 52).

14.    Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Debris reduction in laser-produced plasma x-ray generation using metal-doped glass target,'' The 2nd US-Japan Workshop on Soft X-ray Optics, Yamanashi (Japan), 12-14 November 1996, P-15, (Technical Digest, pp. 125).

13.    Naoshi Uesugi, Hidetoshi Nakano, and Tadashi Nishikawa, "Enhancement of X-ray generation yield from femtosecond laser produced plasma,'' The 2nd US-Japan Workshop on Soft X-ray Optics, Yamanashi (Japan), 12-14 November 1996, We-2, (Technical Digest, pp. 27).

12.    Tadashi Nishikawa, and Naoshi Uesugi, "Pulse narrowing effect in the traveling-wave parametric propagation process,'' XX International Quantum Electronics Conference, Sydney (Australia), 14-19 July 1996, WL52, (Technical Digest, pp. 163).

11.    Hidetoshi Nakano, Tadashi Nishikawa, Hyeyoung Ahn, and Naoshi Uesugi, "Temporal evolution of soft x-ray pulse from Al plasma produced by a pair of femtosecond laser pulses,'' Conference on Lasers and Electro-optics, Anaheim (USA), 2-7 June 1996, CThK61, (Technical Digest, pp. 437).

10.    Hyeyoung Ahn, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi,
"Absorption/X-ray emission mechanism in ultrashort laser-produced gaseous plasma measured by femtosecond ellipsometry,'' International Seminar on Physics of High Energy Density Matter, Vancouver (Canada), 25-29 May 1996, P-I-4.

9.      Tadashi Nishikawa, Hidetoshi Nakano, Hyeyoung Ahn, Tadashi Serikawa, and Naoshi Uesugi, "X-ray generation from femtosecond Ti: Al₂O₃ laser produced plasma on porous silicon,'' Photon Technology Workshop, Tsukuba (Japan), 11-12 March 1996, H-4, (Technical Digest, H-4).

8.      Hidetoshi Nakano, Tadashi Nishikawa, Hyeyoung Ahn, and Naoshi Uesugi, "Effects of prepulse on soft x-ray pulses from aluminum plasma produced by femtosecond Ti:sapphire laser pulses,'' International Workshop on Femtosecond Technology, Tsukuba (Japan), 21-22 February 1996, Session 4-15, (Technical Digest, pp. 61).

7.      Hyeyoung Ahn, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Time-resolved study of subpicosecond intense laser pulses in a preformed plasma,'' OSA Annual Meeting & Exhibit, Oregon (USA), 10-15 September 1995, ThHH8.

6.      Tadashi Nishikawa, and Naoshi Uesugi, "Optical parametric propagation process in KTiOPO₄ crystals,'' The Pacific Rim Conference on Lasers and Electro-Optics, Makuhari (Japan), 10-14 July 1995, ThG2, (Technical Digest, pp. 128-129).

5.      Hyeyoung Ahn, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi, "Observation and analysis of the role of preformed plasma in soft x-ray generation studied by an ultrafast spectroscopic method,'' The Pacific Rim Conference on Lasers and Electro-Optics, Makuhari (Japan), 10-14 July 1995, ThE3, (Technical Digest, pp. 122-123).

4.      Hidetoshi Nakano, Tadashi Nishikawa, Hyeyoung Ahn, and Naoshi Uesugi, "Dependence of x-ray yield from aluminum plasma produced by a pair of femtosecond Ti:sapphire laser pulses on pulse time separation,'' 12th International Conference on Laser Interaction and Related Plasma Phenomena, Osaka (Japan), 24-28 April 1995, TuP-20.1, (Technical Digest, pp. 172).

3.      Hidetoshi Nakano, Tadashi Nishikawa, Hyeyoung Ahn, and Naoshi Uesugi, "Prepulse effects on x-ray generation from aluminum plasma produced by femtosecond Ti:sapphire laser pulses,'' International Workshop on Femtosecond Technology, Tsukuba (Japan), 16-17 February 1995, Session 4-21, (Technical Digest, pp. 57).

2.      Naoshi Uesugi, Hidetoshi Nakano, Tadashi Nishikawa, and Hyeyoung Ahn, "X-ray generation from metal plasma produced by high power femtosecond Ti-Al₂O₃laser,'' The 4th workshop on energy quality and control of charged particle systems, Naka (Japan), 6-7 July 1994.

1.      Naoshi Uesugi, Tadashi Nishikawa, and Junji Yumoto, "Tunable stimulated parametric fluorescence in KTP crystal pumped by a picosecond optical pulse,'' IEEE Lasers and Electro-Optics Society Annual Meeting, Boston (USA), 4-9 November 1990, ELT7.2, (Technical Digest, pp. 77).