2002 Fiscal Year Annual Research Report

極限的短パルス光の発生とその物質との相互作用

Research Project

Project/Area Number	14002003
Research Institution	The University of Tokyo
Principal Investigator	小林孝嘉東京大学, 大学院・理学系研究科, 教授 (60087509)
Co-Investigator(Kenkyū-buntansha)	平澤正勝東京大学, 大学院・理学系研究科, 助手 (90262162)
Keywords	超短光パルス発生 / 非平行光パラメトリック増幅(NOPA) / キャリアエンベロープ位相(CEP) / 絶対位相のロック / 遷移状態分光 / 物質・超短パルス相互作用 / 超広帯域光スペクトル発生 / パルス圧縮
Research Abstract	本研究での目的は、(1)極限的超短パルスの発生、(2)超短パルス特性の新計測法の開発、(3)遷移状態分光法の確立、(4)物質・超短パルス相互作用の解明の4点である。 (1)これまで非平行パラメトリック増幅(NOPA)法を用いて、3.9フェムト秒の最短光パルスを発生させてきているが、新たに開発された広帯域位相整合結晶を用いた広帯域光発生に着手した。この新物質の広帯域特性を用いることで、これまでの手法を応用して更なる短パルス発生が可能であることが明らかになってきた。また、複数のNOPA装置を組み合わせ、実効的な位相整合領域を広げることによる超広帯域発生を試みている。 (2)5フェムト秒以下の超短光パルスでは強度の時間変化だけでなく、その絶対位相を確定することが重要となる。これまでにこの絶対位相をロックした光発生とその計測に成功しているが、さらにこれを進めて、高速な測定法と組み合わせたフィードバック法などを用いて、レーザーの動的な最適化安定化を図る方法を開発してい<。 (3)種々の物質、高分子や色素分子などに対して、上記の超短光パルスを用いた時間分解分光を行った。特にアゾベンゼンやバクテリオロドプシンの光異性化に伴う構造変化の遷移状態での分子振動の変化を観測できたのは、特筆すべきことである。 (4)現在、超短パルスを用いたTHz光発生を行っている。これまでの数百フェムト秒領域の光励起の場合に比べて、広帯域THz光発生が期待されるが、これを実験的に検証中である。

Research Products

(20 results)

All Other

All Publications (20 results)

[Publications] T.Saito, T.Kobayashi: "Real-time spectroscopy of excited states in azobenzene"Opt.Materials. 21. 301-305 (2002)
[Publications] H.Hashimoto, T.Yoda, T.Kobayashi, A.J.Young: "Molecular structures of carotenoid molecules as predicted by MNDO-AMl molecular orbital calculations"J.Mol.Struct.. 604. 125-146 (2002)
[Publications] H.Kano, T.Kobayashi: "Time-resolved fluorescence and absorption spectroscopies of porphyrin J-aggregates"J.Chem.Phys.. 116. 184-195 (2002)
[Publications] X.Chen, T.Kobayashi: "The effect of the electron-electron interactions on localization in one-dimensional disordered model with long-range correlation"Solid State Commun.. 122. 479-483 (2002)
[Publications] X.Chen, T.Kobayashi: "Pump-probe spectra of linear molecular aggregates with the coupling of the heterolevel exciton states"J.Chem.Phys.. 117. 11347 (2002)
[Publications] H.Kano, T.Saito, T.Kobayashi: "Observation of Herzberg-Teller-type wave-packet motion in porphyrin J-aggregates studied by sub-5-fs spectroscopy"J.Phys.Chem.A. 106. 3445-3453 (2002)
[Publications] T.Saito, T.Kobayashi: "Conformational change in azobenzene in photoisomerization process studied with chirp-controlled sub-10-fs pulses"J.Phys.Chem.A. 106. 9436-9441 (2002)
[Publications] H.F.Hofmann, T.Fuji, T.Kobayashi: "Photon echo signature of vibrational superposition states created by femtosecond excitation of molecules"J.Opt.B. 4. 99-102 (2002)
[Publications] H.Hashimoto, T.Yoda, T.Kobayashi, A.J.Young: "Molecular structures of carotenoids as predicted by MNDO-AM1 molecular orbital calculations"J.Mol.Struct.. 604. 125-146 (2002)
[Publications] A.Baltuska, T.Fuji, T.Kobayashi: "Self-referencing of the carrier-envelope slip in a 6-fs visible parametric amplifier"Opt.Lett.. 27. 1241-1243 (2002)
[Publications] K.Yanagi, T.Nakashima, T.Yamada, T.Kobayashi, H.Hashimoto: "Nonlinear optical properties of hydrazones derived from biological polyenes"Carotenoid Science. 5. 41-42 (2002)
[Publications] A.Baltuska, T.Kobayashi: "Adaptive shaping of two-cycle visible pulses using a flexible mirror"Appl.Phys.B. 75. 427-443 (2002)
[Publications] Y.Kameoka, K.Yanagi, T.Yamada, T.Kobayashi, R.J.Cogdell, H.Hashimoto: "Nonlinear optical properties of carotenoides bound to chromatophore membranes"Carotenoid Science. 5. 37-38 (2002)
[Publications] A.Sugita, T.Furuhi, M.Yamashita, T.Kobayashi: "Visible to near-infrared ultrafast spectroscopy of a quasi-one-dimensional halogen-bridged mixed-valence metal-complex [Pt(en)_2] [Rt(en)_2Cl_2] (ClO_4)_4"J.Phys.Chem.A. 106. 581-588 (2002)
[Publications] H.Kano, T.Kobayashi: "Real-time spectroscopy of Frenkel exciton system"J.Lumin.. 100. 269-282 (2002)
[Publications] S.Adachi, V.M.Kobryanskii, T.Kobayashi: "Excitation of a breather mode of bound soliton pairs in trans-polyacetylene by sub-5-fs optical pulses"Phys.Rev.Lett.. 89. 27401 (2002)
[Publications] A.Baltuska, T.Fuji, T.Kobayashi: "Controlling the carrier-envelope phase of ultrashort light pulses with optical parametric amplifiers"Phys.Rev.Lett.. 88. 133901 (2002)
[Publications] A.Baltuska, T.Fuji, T.Kobayashi: "Visible pulse compression to 4 fs by optical parametric amplification and programmable dispersion contro"Opt.Lett.. 27. 306-308 (2002)
[Publications] T.Fuji, H.J.Ong, T.Kobayashi: "Real-time observation of vibrational coherence after internal conversion and intramolecular vibrational redistribution"Phys.Rev.Lett.. (to be published). (2003)
[Publications] H.Kano, T.Kobayashi: "Real-time spectroscopy of the excited-state excitons in porphyrin J-aggregates"Bull.Chem.Soc.Jpn.. 75. 1071-1074 (2002)

2002 Fiscal Year Annual Research Report

極限的短パルス光の発生とその物質との相互作用

Principal Investigator

小林 孝嘉 東京大学, 大学院・理学系研究科, 教授 (60087509)

Research Products

[Publications] T.Saito, T.Kobayashi: "Real-time spectroscopy of excited states in azobenzene"Opt.Materials. 21. 301-305 (2002)

[Publications] H.Hashimoto, T.Yoda, T.Kobayashi, A.J.Young: "Molecular structures of carotenoid molecules as predicted by MNDO-AMl molecular orbital calculations"J.Mol.Struct.. 604. 125-146 (2002)

[Publications] H.Kano, T.Kobayashi: "Time-resolved fluorescence and absorption spectroscopies of porphyrin J-aggregates"J.Chem.Phys.. 116. 184-195 (2002)

[Publications] X.Chen, T.Kobayashi: "The effect of the electron-electron interactions on localization in one-dimensional disordered model with long-range correlation"Solid State Commun.. 122. 479-483 (2002)

[Publications] X.Chen, T.Kobayashi: "Pump-probe spectra of linear molecular aggregates with the coupling of the heterolevel exciton states"J.Chem.Phys.. 117. 11347 (2002)

[Publications] H.Kano, T.Saito, T.Kobayashi: "Observation of Herzberg-Teller-type wave-packet motion in porphyrin J-aggregates studied by sub-5-fs spectroscopy"J.Phys.Chem.A. 106. 3445-3453 (2002)

[Publications] T.Saito, T.Kobayashi: "Conformational change in azobenzene in photoisomerization process studied with chirp-controlled sub-10-fs pulses"J.Phys.Chem.A. 106. 9436-9441 (2002)

[Publications] H.F.Hofmann, T.Fuji, T.Kobayashi: "Photon echo signature of vibrational superposition states created by femtosecond excitation of molecules"J.Opt.B. 4. 99-102 (2002)

[Publications] H.Hashimoto, T.Yoda, T.Kobayashi, A.J.Young: "Molecular structures of carotenoids as predicted by MNDO-AM1 molecular orbital calculations"J.Mol.Struct.. 604. 125-146 (2002)

[Publications] A.Baltuska, T.Fuji, T.Kobayashi: "Self-referencing of the carrier-envelope slip in a 6-fs visible parametric amplifier"Opt.Lett.. 27. 1241-1243 (2002)

[Publications] K.Yanagi, T.Nakashima, T.Yamada, T.Kobayashi, H.Hashimoto: "Nonlinear optical properties of hydrazones derived from biological polyenes"Carotenoid Science. 5. 41-42 (2002)

[Publications] A.Baltuska, T.Kobayashi: "Adaptive shaping of two-cycle visible pulses using a flexible mirror"Appl.Phys.B. 75. 427-443 (2002)

[Publications] Y.Kameoka, K.Yanagi, T.Yamada, T.Kobayashi, R.J.Cogdell, H.Hashimoto: "Nonlinear optical properties of carotenoides bound to chromatophore membranes"Carotenoid Science. 5. 37-38 (2002)

[Publications] A.Sugita, T.Furuhi, M.Yamashita, T.Kobayashi: "Visible to near-infrared ultrafast spectroscopy of a quasi-one-dimensional halogen-bridged mixed-valence metal-complex [Pt(en)_2] [Rt(en)_2Cl_2] (ClO_4)_4"J.Phys.Chem.A. 106. 581-588 (2002)

[Publications] H.Kano, T.Kobayashi: "Real-time spectroscopy of Frenkel exciton system"J.Lumin.. 100. 269-282 (2002)

[Publications] S.Adachi, V.M.Kobryanskii, T.Kobayashi: "Excitation of a breather mode of bound soliton pairs in trans-polyacetylene by sub-5-fs optical pulses"Phys.Rev.Lett.. 89. 27401 (2002)

[Publications] A.Baltuska, T.Fuji, T.Kobayashi: "Controlling the carrier-envelope phase of ultrashort light pulses with optical parametric amplifiers"Phys.Rev.Lett.. 88. 133901 (2002)

[Publications] A.Baltuska, T.Fuji, T.Kobayashi: "Visible pulse compression to 4 fs by optical parametric amplification and programmable dispersion contro"Opt.Lett.. 27. 306-308 (2002)

[Publications] T.Fuji, H.J.Ong, T.Kobayashi: "Real-time observation of vibrational coherence after internal conversion and intramolecular vibrational redistribution"Phys.Rev.Lett.. (to be published). (2003)

[Publications] H.Kano, T.Kobayashi: "Real-time spectroscopy of the excited-state excitons in porphyrin J-aggregates"Bull.Chem.Soc.Jpn.. 75. 1071-1074 (2002)

小林孝嘉東京大学, 大学院・理学系研究科, 教授 (60087509)