【学・協会誌論文】

■ 2020年

“Silicon twisted cone structure produced by optical vortex pulse with structure evaluation by radiation hydrodynamic simulation”
Daisuke Nakamura, Ryohei Tasaki, Miki Kawamoto, Hiroki Ohshima, Mitsuhiro Higashihata, Hiroshi Ikenoue, Toshitaka Wakayama, Atsushi Sunahara, and Takeshi Higashiguchi
Scientific Reports (Nature Research), Vol. 10, Article number 20512 (11 pages) (2020.12).
https://doi.org/10.1038/s41598-020-77323-4

“Detection of birefringence singularity by supercontinuum vector beam”
Misaki Shoji, Toshitaka Wakayama, Hirokazu Ishida, Hiroyuki Kowa, Kazuyuki Sakaue, Taisuke Miura, and Takeshi Higashiguchi
Applied Optics, Vol. 59(34), pp. 10846-10852 (2020.12).
https://doi.org/10.1364/AO.409477

“Ablation threshold and crater morphology of amorphous and crystalline SiO2 glass for extreme ultraviolet femtosecond pulses”
Tatsunori Shibuya, Kazuyuki Sakaue, Hiroshi Ogawa, Thanh-Hung Dinh, Daisuke Satoh, Eichi Terasawa, Masakazu Washio, Masahito Tanaka, Takeshi Higashiguchi, Masahiko Ishino, Yuya Kubota, Yuichi Inubushi, Shigeki Owada, Masaharu Nishikino, Yohei Kobayashi, and Ryunosuke Kuroda
Japanese Journal of Applied Physics, Vol. 59(12), Article number 122004 (3 pages) (2020.11).
https://doi.org/10.35848/1347-4065/abc85a

“Investigation of extreme ultraviolet spectra from highly charged holmium ions in 1-μm laser-produced plasmas”
Tao Wu, Hiromu Kawasaki, Yuta Shimada, Takeshi Higashiguchi, and Gerry O’Sullivan
Journal of Physics B, Vol. 53(22), Article number 225701 (13 pages) (2020.10).
https://doi.org/10.1088/1361-6455/abb124

“Study on X-ray Enhancement in Laser-Compton Scattering for Auger Therapy”
Yuya Koshiba, Ryosuke Morita, Koki Yamashita, Masakazu Washio, Kazuyuki Sakaue, Takeshi Higashiguchi, and Junji Urakawa
International Journal of Radiation Biology, Vol. 10, Article number 1811420 (5 pages) (2020.9).
https://doi.org/10.1080/09553002.2020.1811420

“Charge-separated spectra of suprathermal highly charged bismuth ions in a dual laser-produced plasma soft x-ray source”
Hiromu Kawasaki, Toshiki Tamura, Atsushi Sunahara, Masaharu Nishikino, Shinichi Namba, Gerry O’Sullivan, and Takeshi Higashiguchi
Review of Scientific Instruments, Vol. 91(8), Article number 086103 (4 pages) (2020.8)
https://doi.org/10.1063/5.0012225

“Single-shot multispectral birefringence mapping by supercontinuum vector beams”
Misaki Shoji, Toshitaka Wakayama, Hirokazu Ishida, Hiroyuki Kowa, Kazuyuki Sakaue, Taisuke Miura, and Takeshi Higashiguchi
Applied Optics, Vol. 59(23), pp. 7131-7138 (2020.8).
https://doi.org/10.1364/AO.393419

“Observation of water-window soft x-ray emission from laser-produced Au plasma under optically thin condition”
Christian John, Maki Kishimoto, Yasuhiro Matsumoto, Takehiro Morishita, Takeshi Higashiguchi, Takuma Endo, Atsushi Sunahara, Tomoyuki Johzaki, and Shinichi Namba
High Energy Density Physics, Vol. 37, Article number 100845 (7 pages) (2020.6).
https://doi.org/10.1016/j.hedp.2020.100845

「レーザー光による内面形状計測 ： 外耳道の3次元マッピング」
東口 武史
レーザー研究, Vol. 48(6), pp. 301-305 (2020.6).

“Electron temperature and soft x-ray intensity scaling in laser heavy element plasma interaction”
Hiromu Kawasaki, Atsushi Sunahara, Yuta Shimada, Takeo Ejima, Weihua Jiang, Gerry O’Sullivan, Masaharu Nishikino, Shinichi Namba, and Takeshi Higashiguchi
AIP Advances, Vol. 10, Article number 065306 (6 pages) (2020.6).
https://doi.org/10.1063/5.0009946

“Surface processing of PMMA and metal nano-particle resist by sub- micrometer focusing of coherent extreme ultraviolet high-order harmonics pulses”
Kazuyuki Sakaue, Hiroto Motoyama, Ryosuke Hayashi, Atsushi Iwasaki, Hidekazu Mimura, Kaoru Yamanouchi, Tatsunori Shibuya, Masahiko Ishino, Thanh-Hung Dinh, Hiroshi Ogawa, Takeshi Higashiguchi, Masaharu Nishikino, and Ryunosuke Kuroda
Optics Letters, Vol. 45(10), pp. 2926-2929 (2020.5).
https://doi.org/10.1364/OL.392695
Spotlight on Optics (Highlighted Articles from OSA Journals)
https://www.osapublishing.org/spotlight/summary.cfm?id=431803

“Development of a soft x-ray laser beamline for irradiation-induced surface processing studies”
Masahiko Ishino, Thanh-Hung Dinh, Yuji Hosaka, Noboru Hasegawa, Kimio Yoshimura, Hiroki Yamamoto, Tadashi Hatano, Takeshi Higashiguchi, Kazuyuki Sakaue, Satoshi, Ichimaru, Masatoshi Hatayama, Akira Sasaki, Masakazu Washio, Masaharu Nishikino, and Yasunari Maekawa
Applied Optics, Vol. 59(12), pp. 3692-3698 (2020.4).
https://doi.org/10.1364/AO.387792

“Demonstration of stimulated emission depletion phenomenon in luminescence of solid-state scintillator excited by soft X-rays”
Takeo Ejima, Toshitaka Wakayama, Natsumi Shinozaki, Misaki Shoji, Genta Hatayama, and Takeshi Higashiguchi
Scientific Reports (Nature Research) , Vol. 10, Article number 5391 (10 pages) (2020.3).
https://doi.org/10.1038/s41598-020-62100-0

“Luminescence properties of scintillators in soft X-ray region”
Takeo Ejima, Shunsuke Kurosawa, Akihiro Yamaji, Tadashi Hatano, Toshitaka Wakayama, Takeshi Higashiguchi, and Mamoru Kitaura
Journal of Luminescence, Vol. 219, Article number 116850 (9 pages) (2020.3).
https://doi.org/10.1016/j.jlumin.2019.116850

“Development of an experimental database of EUV spectra from highly charged ions of medium to high Z elements in the Large Helical Device plasmas”
Chihiro Suzuki, Izumi Murakami, Fumihiro Koike, Takeshi Higashiguchi, Hiroyuki A. Sakaue, Naoki Tamura, Shigeru Sudo, and Gerry O’Sullivan,
X-Ray Spectrometry, Special Issue Article, pp. 78-84 (2020.1).
https://doi.org/10.1002/xrs.3058

 

■ 2019年

「外耳道および耳介の3次元マッピング」
高橋 優太，石山 貴之，庄司 美咲，川崎 太夢，東口 武史，若山 俊隆
生体医工学, Vol. 57(6), pp. 181-189 (2019.12).
https://doi.org/10.11239/jsmbe.57.181

“Controlling the Response of Silicon to Strong Excitation – a Path towards Processing Materials at Sub-nanometer Precision”
Thanh-Hung Dinh, Nikita Medvedev, Masahiko Ishino, Toshiyuki Kitamura, Noboru Hasegawa, Tomohito Otobe, Takeshi Higashiguchi, Kazuyuki Sakaue, Masakazu Washio, Tadashi Hatano, Akira Kon, Yuya Kubota, Yuichi Inubushi, Shigeki Owada, Tatsunori Shibuya, Beata Ziaja, and Masaharu Nishikino
Communications Physics (Nature Research), Vol. 2, Article number 150 (9 pages) (2019.11).
https://doi.org/10.1038/s42005-019-0253-2

“Electron temperature optimization for efficient water-window soft x-ray emission from discharge-produced highly charged zirconium ions”
Hayato Ohashi, Hiroyuki Hara, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Akira Sasaki, Chihiro Suzuki, Naoki Tamura, Hiroyuki A. Sakaue, Daiji Kato, Izumi Murakami, and Takeshi Higashiguchi
Journal of the Optical Society of America B, Vol. 36(12), pp. 3555-3561 (2019.11).
https://doi.org/10.1364/JOSAB.36.003555

“Optimized highly charged ion production for strong soft x-ray sources obeying quasi-Moseley’s law”
Yuta Shimada, Hiromu Kawasaki, Kanon Watanabe, Hiroyuki Hara, Kyoya Anraku, Misaki Shoji, Toru Oba, Masaru Matsuda, Weihua Jiang, Atsushi Sunahara, Masaharu Nishikino, Shinichi Namba, Gerry O’Sullivan, and Takeshi Higashiguchi
AIP Advances, Vol. 9(11), Article number 115315 (6 pages) (2019.11).
https://doi.org/10.1063/1.5127943

“Soft X-ray spectral analysis of laser produced molybdenum plasmas using the fundamental and second harmonics of a Nd:YAG laser”
Ragava Lokasani, Hiromu Kawasaki, Yuta Shimada, Misaki Shoji, Kyoya Anraku, Takeo Ejima, Tadashi Hatano, Weihua Jiang, Shinichi Namba, Jan Nikl, Michal Zeman, Gerry O’Sullivan, Takeshi Higashiguchi, and Jiri Limpouch
Optics Express, Vol. 27(23), pp. 33351-33358 (2019.10).
https://doi.org/10.1364/OE.27.033351

“Supercontinuum vector beam generation by independent manipulations of angular polarization and geometric phase”
Toshitaka Wakayama, Natsumi Shinozaki, Misaki Shoji, Takayuki Ishiyama, Kazuyuki Sakaue, Taisuke Miura, Takeo Ejima, and Takeshi Higashiguchi
Applied Physics Letters, Vol. 114, 231101 (5 pages) (2019).

“Enhancement of water-window soft X-ray emission from laser produced Au plasma under low-pressure nitrogen atmosphere”
Christian John, Maki Kishimoto, Tomoyuki Johzaki, Takeshi Higashiguchi, Noboru. Kakunaka, Yasuhiro Matsumoto, Noboru Hasegawa, Masaharu Nishikino, Takeo Ejima, Atsushi Sunahara, Takuma Endo, and Shinichi Namba
Optics Letters, Vol. 44, pp. 1439-1442 (2019).

“Design of niobium-based mushroom-shaped cavity for critical magnetic field evaluation of superconducting multilayer thin films toward achieving higher accelerating gradient cavity”
Hiroki Oikawa, Takeshi Higashiguchi, and Hitoshi Hayano
Japanese Journal of Applied Physics (Brief Note), Vol. 58, 028001 (4 pages) (2019).

“Efficient near-infrared supercontinuum beam generation in ytterbium-doped double-clad passive fiber”
Misaki Shoji, Natsumi Shinozaki, Takuya Gisuji, Yusuke Fujii, Masayuki Iigo, Kenji Yamane, Kazuyuki Sakaue, Taisuke Miura, and Takeshi Higashiguchi
Journal of the Optical Society of America B, Vol. 36, pp. 48-52 (2019).

 

■ 2018年

“Deep-hole drilling of amorphous silica glass by extreme ultraviolet femtosecond pulses”
Tatsunori Shibuya, Takashi Takahashi, Kazuyuki Sakaue, Thanh Hung Dinh, Hiroyuki Hara, Takeshi Higashiguchi, Masahiko Ishino, Yuya Koshiba, Masaharu Nishikino, Hiroshi Ogawa, Masahito Tanaka, Masakazu Washio, Yohei Kobayashi, and Ryunosuke Kuroda
Applied Physics Letters, Vol. 113, 151901 (4 pages) (2018).

“Soft x-ray spectral analysis of samarium plasmas produced by solid-state laser pulses”
Ragava Lokasani, John Sheil, Ellie Floyd Barte, Hiroyuki Hara, Toshiki Tamura, Takuya Gisuji, Takeshi Higashiguchi, Chihiro Suzuki, Padraig Dunne, Gerry O’Sullivan, and Jiri Limpouch
Journal of Physics B, Vol. 51, 215001 (9 pages) (2018).

“Intense water-window soft x-ray emission by spectral control using dual laser pulses”
Goki Arai, Hiroyuki Hara, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Hayato Ohashi, Shinichi Namba, Atsushi Sunahara, Akira Sasaki, Masaharu Nishikino, Gerry O’Sullivan, and Takeshi Higashiguchi
Optics Express, Vol. 26, pp. 27748-27756 (2018).

“Spectral dynamics of soft x-ray emission in dual laser-produced medium-Z plasma”
Hayato Ohashi, Hiroyuki Hara, Goki Arai, Tadashi Hatano, Takeo Ejima, Chihiro Suzuki, Shinichi Namba, Akira Sasaki, Masaharu Nishikino, Gerry O’Sullivan, and Takeshi Higashiguchi
Applied Physics B, Vol. 124, 193 (6 pages) (2018).

“Development of laboratory-type soft X-ray microscope, CXRM, in Water-window using LPP light source”
Takeo Ejima, Yuichi Ono, Keisuke Ito, Hiromu Kawasaki, Takeshi Higashiguchi, Shigenobu Tone, and Tadashi Hatano
Microscopy and Microanalysis, Vol. 24, pp. 214-215 (2018).

“Emission of water-window soft x-rays under optically thin conditions using low-density foam targets”
Hiroyuki Hara, Hiromu Kawasaki, Toshiki Tamura, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Hayato Ohashi, Shinichi Namba, Atsushi Sunahara, Akira Sasaki, Masaharu Nishikino, Gerry O’Sullivan, and Takeshi Higashiguchi
Optics Letters, Vol. 43, pp. 3750-3753 (2018).

“Design and resonant condition measurement of the mushroom-shaped Al test cavity for critical magnetic field evaluation of superconductor thin-film sample”
Hiroki Oikawa, Takeshi Higashiguchi, and Hitoshi Hayano
Review of Scientific Instruments, Vol. 89, 076102 (3 pages) (2018).

“Three-dimensional measurement of an inner surface profile using a supercontinuum beam”
Toshitaka Wakayama, Yuta Takahashi, Yuichi Ono, Yusuke Fujii, Takuya Gisuji, Takuto Ogura, Natsumi Shinozaki, Shun Yamauchi, Misaki Shoji, Hiromu Kawasaki, Takeshi Higashiguchi, and Toru Yoshizawa
Applied Optics, Vol. 57, 5371-5379 (2018).

“Influence of short pulse duration of carbon-dioxide lasers on extreme ultraviolet emission from laser produced plasmas”
Reiho Amano, Thang-Hung Dinh, Atsushi Sasanuma, Goki Arai, Hiroyuki Hara, Yusuke Fujii, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Atsushi Sunahara, Akihiko Takahashi, Daisuke Nakamura, Tatsuo Okada, Kazuyuki Sakaue, Taisuke Miura, Gerry O’Sullivan, and Takeshi Higashiguchi
Japanese Journal of Applied Physics (Rapid Communication), Vol. 57, 070311 (5 pages) (2018).

“Demonstration of a terahertz pure vector beam by tailoring geometric phase”
Toshitaka Wakayama, Takeshi Higashiguchi, Kazuyuki Sakaue, Masakazu Washio, and Yukitoshi Otani
Scientific Reports (Nature), Vol. 8, 8690 (11 pages) (2018).

“Characteristics of soft x-ray and extreme ultraviolet (XUV) emission from laser-produced highly charged rhodium ions”
Ellie Floyd Barte, Hiroyuki Hara, Toshiki Tamura, Takuya Gisuji, When-Bo Chen, Ragava Lokasani, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Chihiro Suzuki, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Akira Sasaki, Takeshi Higashiguchi, and Jiri Limpouch
Journal of Applied Physics, Vol. 123, 183301 (6 pages) (2018).

“Selection of target elements for laser-produced plasma soft x-ray sources”
Toshiki Tamura, Goki Arai, Yoshiki Kondo, Hiroyuki Hara, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Chihiro Suzuki, Gerry O’Sullivan, and Takeshi Higashiguchi
Optics Letters, Vol. 43, 2042-2045 (2018).

 

■ 2017年

“Characteristics of laser produced plasmas of hafnium and tantalum in the 1-7 nm region”
Bowen Li, Takamitsu Otsuka, Emma Sokell, Padraig Dunne, Gerry O’Sullivan, Hiroyuki Hara, Goki Arai, Toshiki Tamura, Yuichi Ono, Thanh-Hung Dinh, and Takeshi Higashiguchi
European Physical Journal D, Vol. 71, 278 (9 pages) (2017).

“Opacity effects on soft X-ray spectra from highly charged lanthanide ions in laser-produced plasmas”
Chihiro Suzuki, Takeshi Higashiguchi, Atsushi Sasanuma, Goki Arai, Yusuke Fujii, Yoshiki Kondo, Thanh-Hung Dinh, Fumihiro Koike, Izumi Murakami, and Gerry O’Sullivan
Nuclear Instruments and Methods in Physics Research Section B, Vol. 408, pp. 253-256 (2017).

“Spectroscopy of Highly Charged Ions for Extreme Ultraviolet Lithography”
Gerry O’Sullivan, Padraig Dunne, Takeshi Higashiguchi, Domagoj Kos, Oisín Maguire, Takanori Miyazaki, Fergal O’Reilly, John Sheil, Emma Sokell, and Deirdre Kilbane
Nuclear Instruments and Methods in Physics Research Section B, Vol. 408, pp. 3-8 (2017).

“Extension of the operational regime of the LHD towards a deuterium experiment”
Y. Takeiri, T. Higashiguchi et al.
Nuclear Fusion, Vol. 57, 102023 (10 pages) (2017).

“Spectral evolution of soft x-ray emission from optically thin, high electron temperature platinum plasmas”
Hiroyuki Hara, Hayato Ohashi, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Akira Sasaki, Chihiro Suzuki, Naoki Tamura, Hiroyuki sakaue, Daiji Kato, Izumi Murakami, Takeshi Higashiguchi, and LHD Experiment Group
APL Photonics, Vol. 2, 081301 (7 pages) (2017).

“High ionization states observed in soft x-ray spectra from plasmas of second row transition elements produced by femtosecond laser pulses”
Ragava Lokasani, Ellie Floyd Barte, Petr Gavrilov, Petr Hribek, Alexandr Jancarek, Domagoj Kos, Michal Nevrkla, Ladislav Pina, Takeshi Higashiguchi, Gerry O’Sullivan, and Jiri Limpouch
Journal of Physics B, Vol. 50, 145001 (10 pages) (2017).

“Generation of the determined vectorial vortex beams by use of an achromatic axially symmetric waveplate”
Toshitaka Wakayama, Takeshi Higashiguchi, and Yukitoshi Otani
Optical Review, Vol. 24, pp. 449-461 (2017).

“Analysis of soft x-ray emission spectra of laser-produced dysprosium, erbium and thulium plasmas”
John Sheil, Padraig Dunne, Takeshi Higashiguchi, Domagoj Kos, Elaine Long, Takanori Miyazaki, Fergal O’Reilly, Gerard O’Sullivan, Paul Sheridan, Chihiro Suzuki, Emma Sokell, Elgiva White, and Deirdre Kilbane
Journal of Physics B, Vol. 50, 065006 (8 pages) (2017).

“Lasing and thermal characteristics of Yb:YAG/YAG composite with atomic diffusion bonding”
Siva Sankar Nagisetty, Patricie Severova, Taisuke Miura, Martin Smrz, Hitoe Kon, Miyuki Uomoto, Takehito Shimatsu, Masato Kawasaki, Takeshi Higashiguchi, Akira Endo, and Tomas Mocek
Laser Physics Letters, Vol. 14, 015001 (6 pages) (2017).

“Analysis of unresolved transition arrays in XUV spectral region from highly charged lead ions produced by subnanosecond laser pulse”
Tao Wu, Takeshi Higashiguchi, Bowen Li, Goki Arai, Hiroyuki Hara, Yoshiki Kondo, Takanori Miyazaki, Thanh-Hung Dinh, Fergal O’Reilly, Emma Sokell, and Gerry O’Sullivan
Optics Communications, Vol. 385, pp. 143-152 (2017).

“Extreme ultraviolet spectroscopy and atomic models of highly charged heavy ions in the Large Helical Device”
Chihiro Suzuki, Izumi Murakami, Fumihiro Koike, Naoki Tamura, Hroyuki A. Sakaue, Shigeru Morita, Motoshi Goto, Daiji Kato, Hayato Ohashi, Takeshi Higashiguchi, Shigeru Sudo, and Gegard O’Sullivan
Plasma Physics and Controlled Fusion, Vol. 59, 014009 (8 pages) (2017).

 

■ 2016年

“Evaluation of a flat-field grazing incidence spectrometer for highly charged ion plasma emission in soft x-ray spectral region from 1 to 10 nm”
Thanh-Hung Dinh, Yoshiki Kondo, Toshiki Tamura, Yuichi Ono, Hiroyuki Hara, Hiroki Oikawa, Yoichi Yamamoto, Masahiko Ishino, Masaharu Nishikino, Tetsuya Makimura, Padraig Dunne, Gerry O’Sullivan, Shigeru Ohta, Ken Kitano, Takeo Ejima, Tadashi Hatano, and Takeshi Higashiguchi
Review of Scientific Instruments, Vol. 87, 123106 (7 pages) (2016).

“Soft X-ray emission from molybdenum plasmas generated by dual laser pulses”
Ragava Lokasani, Goki Arai, Yoshiki Kondo, Hiroyuki Hara, Thanh-Hung Dinh, Takeo Ejima, Tadashi Hatano, Weihua Jiang, Tetsuya Makimura, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Takeshi Higashiguchi, and Jiri Limpouch
Applied Physics Letters, Vol. 109, 194103 (5 pages) (2016).

「レーザー生成プラズマEUV光源の最近の動向」
東口 武史
放射線化学, Vol. 102, pp. 3-9 (2016).

“Characteristics of the soft X-ray emission from laser-produced highly charged platinum plasmas”
Hiroyuki Hara, Goki Arai, Yoshiki Kondo, Thanh-Hung Dinh, Padraig Dunne, Gerry O’Sullivan, Takeo Ejima, Tadashi Hatano, Weihua Jiang, Masaharu Nishikino, Akira Sasaki, Atsushi Sunahara, and Takeshi Higashiguchi
Applied Physics Express, Vol. 9, 066201 (4 pages) (2016).

“Characteristics of extreme ultraviolet emission from high-Z plasmas”
Hayato Ohashi, Takeshi Higashiguchi, Yuhei Suzuki, Masato Kawasaki, Chihiro Suzuki, Kentaro Tomita, Masaharu Nishikino, Shinsuke Fujioka, Akira Endo, Bowen Li, Takamitsu Otsuka, Padraig Dunne, and Gerry O’Sullivan
Journal of Physics: Conference Series, Vol. 688, 012079 (4 pages) (2016).

“Beyond Extreme Ultra Violet (BEUV) Radiation from Spherically symmetrical High-Z plasmas”
Kensuke Yoshida, Shinsuke Fujioka, Takeshi Higashiguchi, Teruyuki Ugomori, Nozomi Tanaka, Masato Kawasaki, Yuhei Suzuki, Chihiro Suzuki, Kentaro Tomita, Ryouichi Hirose, Takeo Ejima, Hayato Ohashi, Masaharu Nishikino, Enda Scally, Hiroaki Nshimura, Hiroshi Azechi, and Gerard O’Sullivan
Journal of Physics: Conference Series, Vol. 688, 012046 (4 pages) (2016).

“Spectral investigation of highly ionized bismuth plasmas produced by subnanosecond Nd:YAG laser pulses”
Tao Wu, Takeshi Higashiguchi, Bowen Li, Goki Arai, Hiroyuki Hara, Yoshiki Kondo, Takanori Miyazaki, Thanh-Hung Dinh, Padraig Dunne, Fergal O’Reilly, Emma Sokell, Gerry O’Sullivan
Journal of Physics B, Vol. 49, 035001 (10 pages) (2016).

“Passive control of a high-energy carbon dioxide-pulsed vectorial vortex beam”
Toshitaka Wakayama, Takeshi Higashiguchi, and Yukitoshi Otani
SPIE Newsroom (2016). [DOI: 10.1117/2.1201512.006281]

「重元素多価イオンプラズマと実験室サイズの極端紫外光源開発」
大橋 隼人，東口 武史
しょうとつ (原子衝突学会誌), Vol. 13, pp. 5-14 (2016).

 

■ 2015年

“Spectroscopy for identification of plasma sources for lithography and water window imaging”
Gerry O’Sullivan, Padraig Dunne, Takeshi Higashiguchi, Bowen Li, Luning Liu, Ragava Lokasani, Elaine Long, Hayato Ohashi, Fergal O’Reilly, Paul Sheridan, Emma Sokell, Chihiro Suzuki, and Tao Wu
Journal of Physics: Conference Series, Vol. 635, pp. 012026-1-012026-8 (2015).

“Numerical evaluation of a 13.5-nm high-brightness microplasma extreme ultraviolet source”
Hiroyuki Hara, Goki Arai, Thanh-Hung Dinh, Weihua Jiang, Taisuke Miura, Akira Endo, Takeo Ejima, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Atsushi Sunahara ,and Takeshi Higashiguchi
Journal of Applied Physics, Vol. 48, pp. 193301-1-193301-7 (2015).

“XUV spectral analysis of ns- and ps-laser produced platinum plasmas”
Tao Wu, Takeshi Higashiguchi, Bowen Li, Yuhei Suzuki, Goki Arai, Thanh-Hung Dinh, Padraig Dunne, Fergal O’Reilly, Emma Sokell and Gerry O’Sullivan
Journal of Physics B, Vol. 48, pp. 245007-1-245007-10 (2015).

“Temporal behavior of unresolved transition array emission in water window soft x-ray spectral region from multiply charged ions”
Thanh-Hung Dinh, Yuhei Suzuki, Goki Arai, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Shinsuke Fujioka, Noboru Hasegawa, Tetsuya Kawachi, Masaharu Nishikino, and Takeshi Higashiguchi
Applied Physics Letters, Vol. 107, pp. 121101-1-121101-5 (2015).

“Generation of radially polarized high energy mid-infrared optical vortex by use of a passive axially symmetric ZnSe waveplate”
Toshitaka Wakayama, Hiroki Oikawa, Atsushi Sasanuma, Goki Arai, Yusuke Fujii, Thanh-Hung Dinh, Takeshi Higashiguchi, Kazuyuki Sakaue, Masakazu Washio, Taisuke Miura, Akihiko Takahashi, Daisuke Nakamura, Tatsuo Okada, Motoki Yonemura, and Yukitoshi Otani
Applied Physics Letters, Vol. 107, pp. 081112-1-081112-5 (2015).

“Properties of the extreme ultraviolet emission from germanium and gallium plasmas”
Bowen Li, Hiroyuki Hara, Yuhei Suzuki, Goki Arai, Takeshi Higashiguchi, Hayato Ohashi, Weihua Jiang, Tetsuya Makimura, Hiroyuki A. Sakaue, Chihiro Suzuki, Daiji Kato, Izumi Murakami, Padraig Dunne, Elaine Long, Paul Sheridan, Ximeng Chen, and Gerry O’Sullivan
Journal of Applied Physics, Vol. 118, pp. 073302-1-073302-8 (2015).

“Analysis of extreme ultraviolet spectra from laser produced rhenium plasmas”
Tao Wu, Takeshi Higashiguchi, Bowen Li, Yuhei Suzuki, Goki Arai, Thanh-Hung Dinh, Padraig Dunne, Fergal O’Reilly, Emma Sokell, Luning Liu, and Gerry O’Sullivan
Journal of Physics B, Vol. 48, pp. 165005-1-165005-8 (2015).

“Spectroscopy of highly charged ions and its relevance to EUV and soft x-ray source development“
Gerry O’Sullivan, Bowen Li, Rebekah D’Arcy, Padraig Dunne, Paddy Hayden, Deirdre Kilbane, Tom McCormack, Hayato Ohashi, Fergal O’Reilly, Paul Sheridan, Emma Sokell, Chihiro Suzuki, and Takeshi Higashiguchi
Journal of Physics B, Vol. 48, pp. 144025-1-144025-16 (2015).

“Characteristics of x-ray emission from optically thin high-Z plasmas in soft x-ray region”
Hayato Ohashi, Takeshi Higashiguchi, Yuhei Suzuki, Goki Arai, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Hiroyuki A. Sakaue, Daiji Kato, Izumi Murakami, Naoki Tamura, Shigeru Sudo, Fumihiro Koike, and Chihiro Suzuki
Journal of Physics B, Vol. 48, pp. 144011-1-144011-7 (2015).

「TESPELを利用した原子分子過程研究」
鈴木 千尋，村上 泉，小池 文博，東口 武史，大橋 隼人
プラズマ・核融合学会誌, Vol. 91, pp. 285-290 (2015).

“Sources for Beyond Extreme Ultraviolet Lithography and Water Window Imaging”
Gerry O’Sullivan, Bowen Li, Padraig Dunne, Paddy Hayden, Deirdre Kilbane, Ragava Lokasani, Elaine Long, Hayato Ohashi, Fergal O’Reilly, John Sheil, Paul Sheridan, Emma Sokell, Chihiro Suzuki, Elgiva White, and Takeshi Higashiguchi
Physica Scripta, Vol. 90, pp. 054002-1-054002-8 (2015).

“Density and x-ray emission profile relationships in highly ionized high-Z laser-produced plasmas”
Kensuke Yoshida, Shinsuke Fujioka, Takeshi Higashiguchi, Teruyuki Ugomori, Nozomi Tanaka, Masato Kawasaki, Yuhei Suzuki, Chihiro Suzuki, Kentaro Tomita, Ryoichi Hirose, Takeo Ejima, Hayato Ohashi, Masaharu Nishikino, Atsushi Sunahara, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Tatsuya Yanagida, Hiroshi Azechi, and Hiroaki Nishimura
Applied Physics Letters, Vol. 106, pp. 121109-1-121109-4 (2015).

“Determination of the polarization states of an arbitrary polarized terahertz beam: Vectorial vortex analysis”
Toshitaka Wakayama, Takeshi Higashiguchi, Hiroki Oikawa, Kazuyuki Sakaue, Masakazu Washio, Motoki Yonemura, Toru Yoshizawa, J. Scott Tyo, and Yukitoshi Otani
Scientific Reports (Nature), Vol. 5, pp. 9416-1-9416-9 (2015).

 

■ 2014年

“Development of a volume-limited dot target for a high brightness extreme ultraviolet microplasma source”
Thanh-Hung Dinh, Yuhei Suzuki, Ryouichi Hirose, Hiroyuki Hara, Hayato Ohashi, Padraig Dunne, Gerry O’Sullivan, Atsushi Sunahara, and Takeshi Higashiguchi
Review of Scientific Instruments, Vol. 85, pp. 116104-1-116104-3 (2014).

“EUV spectroscopy of highly charged high Z ions in the Large Helical Device plasmas”
Chihiro Suzuki, Fumihiro Koike, Izumi Murakami, Naoki Tamura, Shigeru Sudo, Hiroyuki Sakaue, Nobuyuki Nakamura, Shigeru Morita, Motoshi Goto, Daiji Kato, Tomohide Nakano, Takeshi Higashiguchi, Colm Harte, and Gerry O’Sullivan
Physica Scripta, Vol. 89, pp. 114009-1-114009-7 (2014).

“Enhancement of the extreme ultraviolet emission from a potassium plasma by dual laser irradiation”
Takeshi Higashiguchi, Mami Yamaguchi, Takamitsu Otsuka, Takeshi Nagata, Hayato Ohashi, Bowen Li, Rebekah D’Arcy, Padraig Dunne, and Gerry O’Sullivan
Review of Scientific Instruments, Vol. 85, pp. 096102-1-096102-3 (2014).

“Evolution of laser-produced Sn extreme ultraviolet source diameter for high-brightness source”
Amitava Roy, Goki Arai, Hiroyuki Hara, Takeshi Higashiguchi, Hayato Ohashi, Atsushi Sunahara, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Taisuke Miura, Tomas Mocek, and Akira Endo
Applied Physics Letters, Vol. 105, pp. 074103-1-074103-4 (2014).

“Efficient extreme ultraviolet emission from multiple laser-produced one-dimensional spherical plasmas”
Kensuke Yoshida, Shinsuke Fujioka, Takeshi Higashiguchi, Teruyuki Ugomori, Nozomi Tanaka, Hayato Ohashi, Masato Kawasaki, Yuhei Suzuki, Chihiro Suzuki, Kentaro Tomita, Ryoichi Hirose, Takeo Ejima, Masaharu Nishikino, Atsushi Sunahara, Enda Scally, Bowen Li, Tatsuya Yanagida, Hiroaki Nishimura, Hiroshi Azechi, and Gerry O’Sullivan
Applied Physics Express, Vol. 7, pp. 086202-1-086202-4 (2014).

“Quasi-Moseley’s law for strong narrow bandwidth soft x-ray sources containing higher charge-state ions”
Hayato Ohashi, Takeshi Higashiguchi, Yuhei Suzuki, Goki Arai, Yukitoshi Otani, Toyohiko Yatagai, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Weihua Jiang, Akira Endo, Hiroyuki A. Sakaue, Daiji Kato, Izumi Murakami, Naoki Tamura, Shigeru Sudo, Fumihiro Koike, and Chihiro Suzuki
Applied Physics Letters, Vol. 104, pp. 234107-1-234107-5 (2014).

“Analysis of laser produced plasmas of gold in the 1-7 nm region”
Bowen Li, Takeshi Higashiguchi, Takamitsu Otsuka, Noboru Yugami, Padraig Dunne, Deirdre Kilbane, Emma Sokell, and Gerry O’Sullivan
Journal of Physics B, Vol. 47, pp. 075001-1-075001-7 (2014).

“Tuning extreme ultraviolet emission for optimum coupling with multilayer mirrors for future lithography through control of ionic charge states”
Hayato Ohashi, Takeshi Higashiguchi, Bowen Li, Yuhei Suzuki, Masato Kawasaki, Tatsuhiko Kanehara, Yuya Aida, Shuichi Torii, Tetsuya Makimura, Weihua Jiang, Padraig Dunne, Gerry O’Sullivan, and Nobuyuki Nakamura
Journal of Applied Physics, Vol. 115, pp. 033302-1-033302-5 (2014).

「EUV露光光源の研究開発の現状」
東口 武史，藤岡 慎介，砂原 淳，柳田 達哉，溝口 計
レーザー研究, Vol. 42, pp. 14-22 (2014).

 

■ 2013年

“Characteristics of extreme ultraviolet emission from mid-infrared laser-produced rare-earth Gd plasmas”
Takeshi Higashiguchi, Bowen Li, Yuhei Suzuki, Masato Kawasaki, Hayato Ohashi, Shuichi Torii, Daisuke Nakamura, Akihiko Takahashi, Tatsuo Okada, Weihua Jiang, Taisuke Miura, Akira Endo, Padraig Dunne, Gerry O’Sullivan, and Tetsuya Makimura
Optics Express, Vol. 21, pp. 31837-31845 (2013).

「小特集 プラズマによる短波長光源研究の進展とその物理 6. おわりに」
東口 武史
プラズマ・核融合学会誌, Vol. 89, pp. 677-678 (2013).

「小特集 プラズマによる短波長光源研究の進展とその物理 5. プラズマと量子ビームによる短波長光源」
東口 武史，大塚 崇光，鵜篭 照之，藤岡 慎介，西村 博明，鈴木 千尋，坂上 和之，鷲尾 方一，遠藤 彰
プラズマ・核融合学会誌, Vol. 89, pp. 669-676 (2013).

「小特集 プラズマによる短波長光源研究の進展とその物理 1. はじめに」
東口 武史
プラズマ・核融合学会誌, Vol. 89, pp. 652-653 (2013).

“Efficient “water window” soft x-ray high-Z plasma source”
Takeshi Higashiguchi, Takamitsu Otsuka, Weihua Jiang, Akira Endo, Bowen Li, Padraig Dunne, and Gerry O’Sullivan
Journal of Physics: Conference Series, Vol. 463, pp. 012024-1-012024-4 (2013).

「6.x nm 領域における希土類プラズマ極端紫外光源」
大塚 崇光，東口 武史，湯上 登
電気学会論文誌A（基礎・材料・共通部門誌）, Vol. 133, pp. 526-531 (2013).

「EUV光源開発の現状」
東口 武史，遠藤 彰，溝口 計
プラズマ・核融合学会誌, Vol. 89, pp. 341-348 (2013).

“Water window” sources: selection based on the interplay of spectral properties and multilayer reflection bandwidth
Bowen Li, Takeshi Higashiguchi, Takamitsu Otsuka, Weihua Jiang, Akira Endo, Padraig Dunne, and Gerry O’Sullivan
Applied Physics Letters, Vol. 102, pp. 041117-1-041117-4 (2013).

 

■ 2012年

“XUV spectra of laser-produced zirconium plasma”
Bowen Li, Takeshi Higashiguchi, Takamitsu Otsuka, Weihua Jiang, Akira Endo, Padraig Dunne, and Gerry O’Sullivan
Journal of Physics B, Vol. 45, pp. 245004-1-245004-6 (2012).

“Experimental observation of frequency up-conversion by flash ionization”
Akinori Nishida, Noboru Yugami, Takeshi Higashiguchi, Takamitsu Otsuka, Fuminori Suzuki, Masahiro Nakata, Yasuhiko Sentoku, and Ryosuke Kodama
Applied Physics Letters, Vol. 101, pp. 161118-1-161118-3 (2012).

“Analysis of tungsten laser produced plasmas in the extreme ultraviolet (EUV) spectral region”
Colm S Harte, Takeshi Higashiguchi, Takamitsu Otsuka, Rebekah D’Arcy, Deirdre Kilbane, and Gerry O’Sullivan
Journal of Physics B, Vol. 45, pp. 205002-1-205002-6 (2012).

“Investigation of Gd and Tb plasmas for beyond extreme ultraviolet lithography based on multilayer mirror performance”
Bowen Li, Takamitsu Otsuka, Takeshi Higashiguchi, Noboru Yugami, Weihua Jiang, Akira Endo, Padraig Dunne, and Gerry O’Sullivan
Applied Physics Letters, Vol. 101, pp. 013112-1-013112-4 (2012).

“Characteristics of argon plasma waveguide produced by alumina capillary discharge for short wavelength laser application”
Takeshi Higashiguchi, Nadezhda Bobrova, Pavel Sasorov, Shohei Sakai, Yasuhiko Sentoku, Ryosuke Kodama, and Noboru Yugami
Journal of Applied Physics, Vol. 111, pp. 093302-1-093302-7 (2012).

“A tapered parallel plate waveguide for frequency up-conversion of THz radiation”,
Akinori Nishida, Hiroaki Kashiwazaki, Satoshi Yoshida, Takeshi Higashiguchi, Noboru Yugami, and Ryosuke Kodama
Review of Scientific Instruments, Vol. 83, pp. 045104-1-045104-4 (2012).

“The effect of viewing angle on the spectral behavior of a Gd plasma source near 6.7 nm”
Colm O’Gorman, Takamitsu Otsuka, Noboru Yugami, Weihua Jiang, Akira Endo, Bowen Li, Thomas Cummins, Padraig Dunne, Emma Sokell, Gerry O’Sullivan, and Takeshi Higashiguchi
Applied Physics Letters, Vol. 100, pp. 141108-1-141108-4 (2012).

“Optimizing conversion efficiency and reducing ion energy in a laser-produced Gd plasma”
Thomas Cummins, Takamitsu Otsuka, Noboru Yugami, Weihua Jiang, Akira Endo, Bowen Li, Colm O’Gorman, Padraig Dunne, Emma Sokell, Gerry O’Sullivan, and Takeshi Higashiguchi
Applied Physics Letters, Vol. 100, pp. 061118-1-061118-4 (2012).

“Feasibility study of broadband efficient “water window” source”
Takeshi Higashiguchi, Takamitsu Otsuka, Noboru Yugami, Weihua Jiang, Akira Endo, Bowen Li, Padraig Dunne, and Gerry O’Sullivan
Applied Physics Letters, Vol. 100, pp. 014103-1-014103-4 (2012).

 

■ 2011年

“Gd plasma source modeling at 6.7 nm for future lithography”
Bowen Li, Padraig Dunne, Takeshi Higashiguchi, Takamitsu Otsuka, Noboru Yugami, Weihua Jiang, Akira Endo, and Gerry O’Sullivan
Applied Physics Letters, Vol. 99, pp. 231502-1-231502-3 (2011).

“Extreme ultraviolet source at 6.7 nm based on a low-density plasma”
Takeshi Higashiguchi, Takamitsu Otsuka, Noboru Yugami, Weihua Jiang, Akira Endo, Bowen Li, Deirdre Kilbane, Padraig Dunne, and Gerry O’Sullivan
Applied Physics Letters, Vol. 99, pp. 191502-1-191502-3 (2011).

“Properties of a capillary discharge-produced argon plasma waveguide for shorter wavelength source application”
Shohei Sakai, Takeshi Higashiguchi, Nadezhda Bobrova, Pavel Sasorov, Jun Miyazawa, Noboru Yugami, Yasuhiko Sentoku, and Ryosuke Kodama
Review of Scientific Instruments, Vol. 82, pp. 103509-1-103509-4 (2011).

“Observation and numerical analysis of plasma parameters in a capillary discharge-produced plasma channel waveguide”
Hiromitsu Terauchi, Nadezhda Bobrova, Pavel Sasorov, Takashi Kikuchi, Toru Sasaki, Takeshi Higashiguchi, Noboru Yugami, and Ryosuke Kodama
Journal of Applied Physics, Vol. 109, pp. 053304-1-053304-7 (2011).

“Spectral and temporal behavior of an alkali metal plasma extreme ultraviolet source for surface morphology applications”
Takeshi Higashiguchi, Mami Yamaguchi, Takamitsu Otsuka, Hiromitsu Terauchi, Noboru Yugami, Toyohiko Yatagai, Rebekah D’Arcy, Padraig Dunne, and Gerry O’Sullivan
Applied Physics Letters, Vol. 98, pp. 091503-1-091503-3 (2011).

“Microdischarge extreme ultraviolet source with alkali metal vapor for surface morphology application”
Takeshi Higashiguchi, Hiromitsu Terauchi, Takamitsu Otsuka, Mami Yamaguchi, Keisuke Kikuchi, Noboru Yugami, Toyohiko Yatagai, Wataru Sasaki, Rebekah D’Arcy, Padraig Dunne, and Gerry O’Sullivan
Journal of Applied Physics, Vol. 109, pp. 013301-1-013301-6 (2011).

 

■ 2010年

“Systematic investigation of self-absorption and conversion efficiency of 6.7 nm extreme ultraviolet sources”
Takamitsu Otsuka, Deirdre Kilbane, Takeshi Higashiguchi, Noboru Yugami, Toyohiko Yatagai, Weihua Jiang, Akira Endo, Padraig Dunne, and Gerry O’Sullivan
Applied Physics Letters, Vol. 97, pp. 231503-1-231503-3 (2010).

“Rare-earth plasma extreme ultraviolet sources at 6.5–6.7 nm”
Takamitsu Otsuka, Deirdre Kilbane, John White, Takeshi Higashiguchi, Noboru Yugami, Toyohiko Yatagai, Weihua Jiang, Akira Endo, Padraig Dunne, and Gerry O’Sullivan
Applied Physics Letters, Vol. 97, pp. 111503-1-111503-3 (2010).
[introduced by Nature Photonics 4, pp. 809-811 (2010.12) news & views].

“Characterization of the plasma parameters of a capillary discharge-produced plasma channel waveguide to guide an intense laser pulse”
Takeshi Higashiguchi, Masafumi Hikida, Hiromitsu Terauchi, Jin-xiang Bai, Takashi Kikuchi, Yezheng Tao, and Noboru Yugami
Review of Scientific Instruments, Vol. 81, pp. 046109-1-046109-3 (2010).

“Characteristics of extreme ultraviolet emission from a discharge-produced potassium plasma for surface morphology application”
Takeshi Higashiguchi, Hiromitsu Terauchi, Noboru Yugami, Toyohiko Yatagai, Wataru Sasaki, Rebekah D’Arcy, Padraig Dunne, and Gerry O’Sullivan,
Applied Physics Letters, Vol. 96, pp. 131505-1-131505-3 (2010.4).

 

■ 2005年〜2009年の代表的な論文

“Generation of terahertz radiation via an electromagnetically induced transparency at ion acoustic frequency region in laser-produced dense plasmas”
Makoto Nakagawa, Ryosuke Kodama, Takeshi Higashiguchi, and Noboru Yugami
Physical Review E, Vol. 80, pp. 025402(R) (2009).

“Short pulse, high power microwave radiation source with a laser-induced sheet plasma mirror”
Takeshi Higashiguchi and Noboru Yugami
Journal of Applied Physics, Vol. 105, pp. 093301-1-093301-4 (2009).

“Reduction of debris of a CO2 laser-produced Sn plasma extreme ultraviolet source using a magnetic field”
Yoshifumi Ueno, Georg Soumagne, Akira Sumitani, Akira Endo, Takeshi Higashiguchi, and Noboru Yugami
Applied Physics Letters, Vol. 92, pp. 211503 (2008).

“Deposited debris characteristics and its reduction of a laser-produced plasma extreme ultraviolet source using a colloidal tin dioxide jet target”
Masanori Kaku, Sumihiro Suetake Yusuke Senba, Shoichi Kubodera, Masahito Katto, and Takeshi Higashiguchi
Applied Physics Letters, Vol. 92, pp. 181503 (2008).

“Enhancement of extreme ultraviolet emission from a CO2 laser-produced Sn plasma using a cavity target”
Yoshifumi Ueno, Georg Soumagne, Akira Sumitani, Akira Endo, and Takeshi Higashiguchi,
Applied Physics Letters, Vol. 91, pp. 231501 (2007).

“Suppression of suprathermal ions from a colloidal microjet target containing SnO2 nanoparticles by using double laser pulses “
Takeshi Higashiguchi, Masanori Kaku, Masahito Katto, and Shoichi Kubodera ,
Applied Physics Letters, Vol. 91, pp. 151503 (2007).

“Efficient extreme ultraviolet plasma source generated by a CO2 laser and a liquid xenon microjet target”
Yoshifumi Ueno, Tatsuya Ariga, George Soumagne, Takeshi Higashiguchi, Shoichi Kubodera, Igor Pogorelsky, Igor Pavlishin, Daniil Stolyarov, Marcus Babzien, Karl Kusche, and Vitaly Yakimenko
Applied Physics Letters, Vol. 90, pp. 191503 (2007).

“Development of a liquid tin microjet target for an efficient laser-produced plasma extreme ultraviolet source”
Takeshi Higashiguchi, Masaya Hamada, and Shoichi Kubodera
Review of Scientific Instruments, Vol. 78, pp. 036106 (2007).

“Observation of temporal behavior of the emission frequency from an ultrashort, high-power, and compact millimeter-wave source”
Takeshi Higashiguchi, Nobuo Ohata, Kun Li, and Noboru Yugami
Applied Physics Letters, Vol. 90, pp. 111503 (2007).

“Low-debris, efficient laser-produced plasma extreme ultraviolet source by use of a regenerative liquid microjet target containing tin-dioxide (SnO2) nano-particles”
Takeshi Higashiguchi, Naoto Dojyo, Masaya Hamada, Wataru Sasaki, and Shoichi Kubodera
Applied Physics Letters, Vol. 88, pp. 201503 (2006).

“Enhancement of extreme ultraviolet emission from a lithium plasma by use of dual laser pulses”
Takeshi Higashiguchi, Keita Kawasaki, Wataru Sasaki, and Shoichi Kubodera
Applied Physics Letters, Vol. 88, pp. 161502 (2006).

“Optical amplification of argon excimers in the vacuum ultraviolet spectral region, produced by ultrashort-pulse high-intensity-laser-produced electrons”
Yusuke Morita, Takeshi Higashiguchi, and Shoichi Kubodera
Applied Physics B, Vol. 82, pp. 31-33 (2006).

“Debris characteristics of a laser-produced tin plasma for extreme ultraviolet source”,
Takeshi Higashiguchi, Chirag Rajyaguru, Naoto Dojyo, Koji Sakita, Yosuke Taniguchi, Shoichi Kubodera, and Wataru Sasaki
Review of Scientific Instruments, Vol. 76, pp. 126102 (2005).

“Efficient soft x-ray emission source at 13.5 nm by use of a femtosecond-laser-produced Li-based microplasma”
Takeshi Higashiguchi, Chirag Rajyaguru, Shoichi Kubodera, Wataru Sasaki, Noboru Yugami, Takashi Kikuchi, Shigeo Kawata, and Alex Andreev
Applied Physics Letters, Vol. 86, pp 231502 (2005).