論文 - 加来 昌典
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TFBG(傾斜型ブラッグ回折格子)センサーを用いた液体の温度と屈折率の同時計測
亀山晃弘，加来昌典，甲藤正人，窪寺昌一，横谷篤至
レーザー学会第480回研究会報告 RMT-15-31 19 - 24 2015年9月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
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時間遅延をつけたフェムト秒レーザー・ダブルパルスによる加工特性
甲藤正人，杉原隆明，加来昌典，横谷篤至，窪寺昌一
レーザー学会第480回研究会報告 RMT-15-31 31 - 36 2015年9月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
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Photon-stimulated desorption surface spectroscopy by VUV emissions from a laser-produced plasma
Kaku M., Kai D., Katto M., Yokotani A., Sasaki W., Kubodera S.
Conference on Lasers and Electro-Optics Europe - Technical Digest 2015-August 2015年8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 Lasers and Electro-Optics Europe - Technical Digest
© 2015 OSA. We have developed photon-stimulated desorption surface spectroscopy system using broadband VUV emissions from a laser-produced plasma. Observed desorbed atoms or molecules from material surfaces depended on bond energy or molecular structure.
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Photon-stimulated desorption surface spectroscopy by VUV emissions from a laser-produced plasma
Kaku M., Kai D., Katto M., Yokotani A., Sasaki W., Kubodera S.
Conference on Lasers and Electro-Optics Europe - Technical Digest 2015-August 2015年8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 Lasers and Electro-Optics Europe - Technical Digest
© 2015 OSA. We have developed photon-stimulated desorption surface spectroscopy system using broadband VUV emissions from a laser-produced plasma. Observed desorbed atoms or molecules from material surfaces depended on bond energy or molecular structure.
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光電界電離アルゴンエキシマ増幅器を用いた超短パルス真空紫外レーザー 査読あり
加来昌典，甲藤正人，横谷篤至，窪寺昌一
レーザー研究 43 537 - 541 2015年8月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Surface analysis by photo-stimulated desorption using tunable VUV radiation 査読あり
Kaku M., Kai D., Katto M., Yokotani A., Kubodera S., Sasaki W.
Applied Physics B: Lasers and Optics 119 ( 3 ) 427 - 433 2015年6月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：Applied Physics B: Lasers and Optics
© 2015, Springer-Verlag Berlin Heidelberg. We have demonstrated the photon-stimulated surface spectroscopy using broadband vacuum ultraviolet (VUV) emissions from a laser-produced plasma, in which adsorbed atoms or molecules on material surfaces were to be desorbed and dissociated as a result of absorption of the wavelength-selected VUV photons. Desorbed and dissociated atoms or molecules were then detected by a mass spectrometer. Mass spectra of polyethylene and polyvinyl chloride samples were obtained as a function of the irradiation wavelength. We have found sufficient characteristic differences of the mass spectra in the irradiation wavelength shorter than 200 nm in each sample. The desorption and dissociation of atoms or molecules from material surfaces depended on bond energy or molecular structure.
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Photon-stimulated desorption surface spectroscopy by VUV emissions from a laser-produced plasma
Kaku M., Kai D., Katto M., Yokotani A., Sasaki W., Kubodera S.
CLEO: QELS - Fundamental Science, CLEO_QELS 2015 2015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：CLEO: QELS - Fundamental Science, CLEO_QELS 2015
We have developed photon-stimulated desorption surface spectroscopy system using broadband VUV emissions from a laser-produced plasma. Observed desorbed atoms or molecules from material surfaces depended on bond energy or molecular structure. © OSA 2015.
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Surface analysis by photo-stimulated desorption using tunable VUV radiation 査読あり
Masanori Kaku, Daichi Kai, Masahito Katto, Atsushi Yokotani, Shoichi Kubodera, and Wataru Sasaki
Applied Physics B 119 ( 3 ) 427 - 433 2015年4月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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光電界電離アルゴンエキシマ増幅器を用いた 超短パルス真空紫外レーザー
加来 昌典, 甲藤 正人, 横谷 篤至, 窪寺 昌一
レーザー研究 43 ( 8 ) 2015年
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：一般社団法人 レーザー学会
We have constructed the ultrashort pulse vacuum ultraviolet (VUV) laser system with an optical-fieldinducedionization (OFI) Ar2* amplifier. The amplification properties of the OFI Ar2* amplifier wereevaluated. A gain-length product of 0.84 was obtained by using multi-pass amplification with a VUVcavity. The gain-length product was increased up to 4.3 through the use of single-pass amplificationwith a VUV reflector and a hollow fiber. We optimized temporal and spatial overlaps between a VUVseed pulse generated as the 7th harmonic radiation and the OFI Ar2* amplifier. The optimal injectiontime of the seed pulse into the OFI Ar2* amplifier was 20 ns, which agreed with a peak time of Ar2*spontaneous emission. The spatially-resolved amplification of VUV seed pulses at 126 nm was observedin an OFI Ar2* amplifier. The maximum amplification ratio of 3.1 was observed, which corresponded toa gain value of 1.17 cm-1.
DOI： 10.2184/lsj.43.8_537
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High-intensity VUV laser system with OFI Ar<inf>2</inf> amplifier
Kaku M., Deshimaru N., Katto M., Kubodera S.
2014 IEEE Photonics Conference, IPC 2014 515 - 516 2014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：2014 IEEE Photonics Conference, IPC 2014
© 2014 IEEE. We have constructed the high intensity VUV laser system with an optical-field-induced ionization (OFI) Ar 2 amplifier. The evaluated maximum one-pass gain value of the OFI Ar 2 amplifier was 1.17 cm -1 .
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真空紫外光によって誘起される光脱離現象を利用した表面分析技術
加来昌典，甲斐大智，甲藤正人，横谷篤至，窪寺昌一
レーザー学会第471回研究会報告 RMT-14-30 13 - 16 2014年12月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
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高圧力クリプトン中でのクリプトンダイマー生成
窪寺昌一，甲斐大智，池田凌，鶴添文人，加来昌典
レーザー学会第465回研究会報告 RMT-14-30 13 - 17 2014年9月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
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超短パルス短波長光源の開発とその応用
亀山晃弘，加来昌典，甲藤正人，窪寺昌一，横谷篤至
レーザー学会第465回研究会報告 RMT-14-35 47 - 51 2014年9月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）
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Development of ultrashort pulsed VUV laser and its applications 査読あり
Masahito Katto, Masanori Kaku, Atsushi Yokotani, Kenzo Miyazaki, Noriaki Miyanaga, Shoichi Kubodera
Journal of Laser Micro/Nanoengineering 9 ( 2 ) 108 - 112 2014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., Matsuura Y., Kubodera S.
Electronics and Communications in Japan 97 ( 7 ) 12 - 16 2014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：Electronics and Communications in Japan
SUMMARY We observed that the emission intensity in the extreme and vacuum ultraviolet spectral regions using a laser-produced copper-tungsten alloy plasma was 1.3 times higher than when using a pure tungsten plasma. The enhancement of the emission intensity was explained by the difference of the Rosseland mean opacity of each plasma. © 2014 Wiley Periodicals, Inc.
DOI： 10.1002/ecj.11540
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Development of ultrashort pulsed VUV laser and its applications
Katto M., Kaku M., Yokotani A., Miyazaki K., Miyanaga N., Kubodera S.
Journal of Laser Micro Nanoengineering 9 ( 2 ) 108 - 112 2014年6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：Journal of Laser Micro Nanoengineering
Vacuum ultraviolet (VUV) laser systems for advanced applications such as micro and precise processing and photochemical reactions have been developed. We have been constructing a VUV-MOPA system to generate output energy of sub-mJ with a pulse width of sub-picosecond at the wavelength of 126 nm. A VUV seed pulse, generated by the 7th harmonics of a 882 nm Ti:Sapphire (TiS) laser was amplified by the Ar2* medium generated from an optical-field-induced ionization of Ar plasma pumped by the TiS laser. We achieved an amplification of 126 nm seed pulse by a factor of 2.6. Recently, we introduced a new 800 nm TiS laser. This laser was synchronized with the 882 nm TiS laser and the delay between these outputs was controllable. We also developed a photo-stimulated desorption spectroscopy method for surface analysis. A tunable incoherent VUV radia-tion obtained from a laser induced plasma was irradiated the samples and then desorbed species were analyzed by mass spectroscopy. This method enables analysis without sample heating and damaging.
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Optical amplification of VUV femtosecond pulses at 126 nm in OFI Ar <inf>2</inf>* amplifier
Kaku M., Daikyuji T., Fujiyoshi K., Katto M., Kubodera S.
2013 IEEE Photonics Conference, IPC 2013 53 - 54 2013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：2013 IEEE Photonics Conference, IPC 2013
We have observed the spatially-resolved optical amplification of femtosecond VUV pulses at 126 nm using an OFI Ar 2 * amplifier. The maximum amplification ratio of 2.57 was observed, which corresponded to the optical gain of 0.94 cm -1 . © 2013 IEEE.
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Daido H., Suzuki Y., Kawachi T., Fukuda T., Nakagiri T., Kaku M., Kubodera S.
Optics Express 21 ( 23 ) 28182 - 28188 2013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：Optics Express
We describe the direct measurement of actual transmittance of sodium samples with thickness of a 2 mm and 3 mm in a spectral range > 115 nm, resulting in > 50% transmittance of 3 mm thick solid and liquid sodium samples including transmission of a pair of the windows at the wavelength of 120 nm, giving an extinction coefficient of ~10 -6 to ~10 -7 which represents the sodium with a few cm thickness to be partially transparent for this wavelength. To confirm the measurement, we perform simple imaging experiments by the ultra-violet light passing through a 8 mm-thick sodium sample to illuminate a mesh as an object, resulting in obtaining a clear image. © 2013 Optical Society of America.
DOI： 10.1364/OE.21.028182
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Demonstration of partially transparent thick metallic sodium in the vacuum ultraviolet spectral range 査読あり
Hiroyuki Daido, Yoji Suzuki, Tetsuya Kawachi, Takeshi Fukuda, Toshio Nakagiri, Masanori Kaku, and Shoichi Kubodera
Optics Express 110 ( 3 ) 397 - 400 2013年11月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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アルゴンエキシマ増幅器を用いた真空紫外フェムト秒パルスの増幅
加来昌典，大休寺匠，甲藤正人，宮永憲明，窪寺昌一
レーザー学会第449回研究会報告 RMT-13 ( 45 ) 29 - 32 2013年9月
記述言語：日本語 掲載種別：研究論文（その他学術会議資料等）