論文 - 加来 昌典
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Nano-particles of hydroxyapatite formed by underwater laser ablation method
Katto M., Kuroe Y., Kaku M., Kubodera S., Yokotani A., Katayama H., Nakayama T.
ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings 65 - 67 2008年12月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics, Congress Proceedings
Hydroxyapatite (HAp) is a biocompatibility material. We have successfully obtained the nano-particles of hydroxyapatite by the underwater laser ablation. A sintered HAp ceramics target was made of commercially available HAp powder and it was placed in the purified water. The focused KrF excimer laser outputs were irradiated on the target surface at the fluence from 7 J/cm 2 to 23 J/cm 2 at the repetition rate of 100 Hz. We found that the amount of the particles increased in proportional to the laser fluence. However, the rate of content of sub-micron particles was became larger at the lower laser fluence. The particles made by 7J/cm 2 laser ablation were dispersing in the water for 12 hours after stopping the laser irradiation.
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酸化錫ナノ粒子コロイドターゲットを用いる極端紫外レーザープラズマ光源のデブリ特性
加来 昌典, 窪寺 昌一
レーザー研究 36 ( 11 ) 726 - 730 2008年11月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：The Laser Society of Japan
ebris characteristics and theireduction have been investigated for a laser-produced plasma extreme ultraviolet source by using a colloidal jet/droplet target containing tin dioxide nanoparticles. The amount of deposited debris on a silicon witness plate was determined by totalaser energy irradiated onto the target. Double laser pulse irradiation was not effective for deposited debris reduction. Incontrast, <I>in situ</I> low-temperature heating of the witness plate was effective inreducing the amount of deposited debris. Room-temperature photon processing using an incoherent vacuum ultraviolet excimer lamp at 126 nm deoxidized a deposited tin oxide layer
DOI： 10.2184/lsj.36.726
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酸化錫ナノ粒子コロイドターゲットを用いる極端紫外レーザープラズマ光源のデブリ特性 査読あり
加来昌典，窪寺昌一
レーザー研究 36 ( 11 ) 726 - 730 2008年11月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Optical amplification of the OFI rare-gas excimers in the vacuum ultraviolet 査読あり
Masanori Kaku, Shinya Harano, Shunsuke Touge, Masahito Katto, Atsushi Yokotani, Shoichi Kubodera, Noriaki Miyanaga, and Kunioki Mima
2008 IEEE LEOS Annual Meeting Conference Proceedings 2008年11月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Kaku M., Suetake S., Senba Y., Katto M., Kubodera S.
Applied Physics B: Lasers and Optics 93 ( 2-3 ) 361 - 364 2008年11月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Applied Physics B: Lasers and Optics
We have demonstrated auto-cleaning of deposited tin debris produced in a laser-plasma extreme ultraviolet (EUV) source by using a liquid jet target containing tin chloride solution. The use of double laser pulse irradiation improved the EUV conversion efficiency of 1.1%, which was 3.3 times as large as that obtained with single laser pulse irradiation. At an appropriate concentration of tin chloride, the amount of deposited debris was balanced out with that of sputtered and/or etched debris, resulting in a thickness of deposited debris less than 1 nm after 40∈000 laser pulse irradiations. © 2008 Springer-Verlag.
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Auto-cleaning of deposited tin debris in a laser-produced plasma extreme ultraviolet source by using a liquid jet target containing tin chloride 査読あり
Masanori Kaku, Sumihiro Suetake, Yusuke Senba, Masahito Katto, and Shoichi Kubodera
Applied Physics B Laser and Optics 93 361 - 364 2008年10月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Nano-particles of hydroxyapatite formed by underwater laser ablation method 査読あり
Masahito Katto, Yasuhiro Kuroer, Masanori Kaku, Shoichi Kubodera, Atushi Yokotani, Hiroaki Katayama, Takeyoshi Nakayama
Congress Proceedings of 27th ICALEO M203 2008年10月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Generation of TW-class 2-cycle pulses using a pressure-gradient hollow fiber
Bohman S., Suda A., Kaku M., Kanai T., Yamaguchi S., Midorikawa K.
2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro-Optics, CLEO/QELS 2008年9月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro-Optics, CLEO/QELS
We demonstrate generation of intense 5 fs pulses using a pressure gradient hollow fiber. The beam after pulse compression could be focused to a diffraction-limited spot with an intensity of 3×10 W/cm 2 . ©2008 Optical Society of America.
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OFI rare-gas excimer amplifier for intense sub-picosecond VUV pulse generation
Kaku M., Taniguchi Y., Oda K., Katto M., Yokotani A., Kubodera S., Miyanaga N., Mima K.
Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series 2008年9月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series
We report the Ar* 2 ampTification with a gain-length product of 6 pumped by a high- intensity laser and the generation of subpicosecond seed pulses at 126 nm using harmonic radiation of an infrared Ti:Sapphire laser. © 2008 Optical Society of America.
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OFI rare-gas excimer amplifier for intense sub-picosecond VUV pulse generation
Kaku M., Taniguchi Y., Oda K., Katto M., Yokotani A., Kubodera S., Miyanaga N., Mima K.
2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro-Optics, CLEO/QELS 2008年9月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro-Optics, CLEO/QELS
We report the Ar* 2 amplification with a gain-length product of 6 pumped by a high- intensity laser and the generation of subpicosecond seed pulses at 126 nm using harmonic radiation of an infrared Ti: Sapphire laser. © 2008 Optical Society of America.
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Generation of TW-class 2-cycle pulses using a pressure-gradient hollow fiber
Bohman S., Suda A., Kaku M., Kanai T., Yamaguchi S., Midorikawala K.
Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series 2008年9月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series
We demonstrate generation of intense 5 fs pulses using a pressure gradient hollow fiber. The beam after pulse compression could be focused to a diffraction-limited spot with an intensity of 3×10 18 W/cm 2 . © 2008 Optical Society of America.
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Development of intense vacuum ultraviolet laser system for precise and microscopic processing 査読あり
Masahito Katto, Atsushi Yokotani, Masanori Kaku, Kazuyoshi Oda, Shoichi Kubodera, Noriaki Miyanaga, and Kunioki Mima
Proceedings of LPM 2008 8 - 16 2008年9月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Generation of 5 fs, 0.5 TW pulses focusable to relativistic intensities at 1 kHz
Bohman S., Suda A., Kaku M., Nurhuda M., Kanal T., Yamaguchi S., Midorikawa K.
Optics Express 16 ( 14 ) 10684 - 10689 2008年7月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Optics Express
We have demonstrated the generation of 5 fs, 0.5 TW pulses at 1 kHz repetition rate using a pulse compression technique in a hollow fiber with a pressure gradient. Owing to the excellent beam quality by passing through the hollow fiber, the beam after pulse compression could be focused to a nearly diffraction-limited spot size. We obtained for the first time a peak intensity as high as 5×10 18 W/cm 2 in the 2-cycle regime. ©2008 Optical Society of America.
DOI： 10.1364/OE.16.010684
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Generation of 5 fs, 0.5 TW pulses focusable to relativistic intensities at 1 kHz 査読あり
Samuel Bohman, Akira Suda, Masanori Kaku, Muhammad Nurhuda, Takuya Kanai, Shigeru Yamaguchi, and Katsumi Midorikawa
Optics Express 16 16684 - 16689 2008年7月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Kaku M., Suetake S., Senba Y., Kubodera S., Katto M., Higashiguchi T.
Applied Physics Letters 92 ( 18 ) 2008年5月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Applied Physics Letters
Debris characteristics and their reduction have been investigated for a laser-produced plasma extreme ultraviolet source by using a colloidal jet target containing tin dioxide nanoparticles. The amounts of deposited debris on a witness plate were determined by total laser energy irradiated onto a target. In situ low-temperature (100 °C) heating of a plate was effective to reduce the amounts of deposited debris, since colloidal debris was easily vaporized by the heat. © 2008 American Institute of Physics.
DOI： 10.1063/1.2924302
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Deposited debris characteristics and its reduction of a laser-produced plasma extreme ultraviolet source using a colloidal tin dioxide jet target 査読あり
Masanori Kaku, Sumihiro Suetake, Yusuke Senba, Shoichi Kubodera, Masahito Katto, and Takeshi Higashiguchi
Applied Physics Letters 92 181503-1 - 181503-3 2008年5月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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OFI rare-gas excimer amplifier for intense sub-picosecond VUV pulse generation 査読あり
Masanori Kaku, Yuta Taniguchi, Kazuyoshi Oda, Masahito Katto, Atsushi Yokotani, Shoichi Kubodera, Noriaki Miyanaga, and Kunioki Mima
CLEO/QELS & PhAST 2008 Technical Digest JThC3 2008年5月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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Generation of TW-class 2-cycle pulses using a pressure-gradient hollow fiber 査読あり
Samuel Bohman, Akira Suda, Masanori Kaku, Takuya Kanai, Shigeru Yamaguchi, and Katsumi Midorikawa
CLEO/QELS & PhAST 2008 Technical Digest JFH2 2008年5月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）
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High-intensity subpicosecond vacuum ultraviolet laser system
Kubodera S., Kaku M., Taniguchi Y., Katto M., Yokotani A., Miyanaga N., Mima K.
Proceedings of SPIE - The International Society for Optical Engineering 6874 2008年4月
記述言語：日本語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Proceedings of SPIE - The International Society for Optical Engineering
We have been developing an ultrashort-pulse high-intensity vacuum ultraviolet (VUV) laser. Ultrashort VUV pulses at 126 nm have been produced in rare-gases by nonlinear wavelength conversion of an infrared Ti:sapphire laser at 882 nm. This pulse will be amplified inside an Ar 2 * amplifier excited by optical-field-induced ionization electrons. The amplification characteristics of the Ar 2 * amplifier has been improved by plasma channeling induced by a high-intensity plasma-initiating laser.
DOI： 10.1117/12.760351
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EUV and debris characteristics of a laser-plasma tin-dioxide nano-particle colloidal jet target 査読あり
Masanori Kaku, Sumihiro Suetake, Yusuke Senba, Masahito Katto, and Shoichi Kubodera
Proceedings of SPIE 6921 69212Y1 - 69212Y8 2008年3月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス）