巻号一覧
32 巻, 11 号
選択された号の論文の9件中1～9を表示しています
- |<
- <
- 1
- >
- >|
「フェムト秒レーザーを用いた超高速非線形分光計測法」解説小特集号
解説小特集号
レーザー解説
-
岡田 正2004 年 32 巻 11 号 p. 678-679
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーPDF形式でダウンロード (146K) -
末元 徹2004 年 32 巻 11 号 p. 680-686
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーRecent developments in the ultrafast luminescence spectroscopy are reviewed. Principles of time-resolved luminescence measurements i.e., the optical Kerr shutter method and the up-conversion technique are described. The formation and relaxation processes of self-trapped excitons in quasi-one-dimensional halogenbridged platinum complexes (Pt-Cl, Pt-Br, Pt-I) are studied by luminescence up-conversion technique. The lifetime of the self-trapped excitons shows a systematic decrease as the mass of the halogen ion increases, showing the increased probability of non-radiative decay processes. The real-time capturing of the nuclear wave-packet form is successfully demonstrated in Pt-Br and good agreements with calculation are obtained. The luminescence in the picosecond region has been observed in the halogen-bridged nickel complex, and a coexistence of localized excitons with small and large lattice relaxations is suggested.抄録全体を表示PDF形式でダウンロード (482K) -
田原 太平2004 年 32 巻 11 号 p. 687-693
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーTime-resolved spectroscopy in the femtosecond time region enables us to observe real-time motion of nuclei of molecules (“the nuclear wavepacket motion”). I describe our recent studies about the nuclear wavepacket motion of the ground- and excited-state molecules in the condensed phase. The significance of this type of spectroscopy, especially in the study of chemical reactions, is discussed.抄録全体を表示PDF形式でダウンロード (402K) -
松本 吉泰2004 年 32 巻 11 号 p. 694-700
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーAdvances in ultrafast laser technologies encourage surface scientists to explore electron and nuclear dynamics at surfaces. Major spectroscopic means are time-resolved nonlinear laser spectroscopy including second harmonic generation (SHG), sum frequency generation (SFG), and two-photon photoemission (2PPE). After introducing fundamental aspects of the nonlinear spectroscopy briefly, this paper describes some recent applications of the nonlinear spectroscopy to ultrafast dynamics at surfaces. Examples include: (1) SFG with tunable infrared pulsed lasers is used for exploring how the vibrational modes of adsorbate couple to bulk phonons when a metal surface is rapidly heated by an ultrafast laser pulse. (2) A vibrational motion of adsorbate on a metal surface is coherently excited by an ultrafast laser pulse and the dephasing of the vibrational mode is probed by time-resolved SHG. (3) Ultrafast electron decay and electron hydration dynamics are explored by 2PPE.抄録全体を表示PDF形式でダウンロード (435K) -
橋本 秀樹, 佐島 徳武, 柳 和宏, 吉澤 雅幸2004 年 32 巻 11 号 p. 701-710
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーCarotenoids in photosynthesis play threefold functions of light-harvesting, excess energy-dissipation, and structural stabilization of pigment-protein complexes. In this review, after introducing basic idea for the molecular architecture and functions of purple bacterial photosystem, photophysics of carotenoids is extensively explained. Special attention is paid for the current understanding of the ultrafast relaxation processes of carotenoids following photoexcitation, which has been clarified by time-resolved laser spectroscopy with unprecedented temporal resolution of sub-20 femtosecond. Another attention is paid for the vibrational relaxation in the electronic excited-state, which has been demonstrated by femtosecond time-resolved stimulated Raman spectroscopy. Finally, topics concerning the coherent control of the light-harvesting system are introduced as a future perspective in this particular research field.抄録全体を表示PDF形式でダウンロード (574K) -
三沢 和彦2004 年 32 巻 11 号 p. 711-716
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーWe present simultaneous measurement of femtosecond time-resolved nonlinear phase and amplitude changes aronud the excitonic resonance in a GaAs/AlGaAs quantum well. The nonlinear phase shift is one of the basic mechanisms of ultrafast semiconductor photonic devices. Full information on the time-resolved and frequencyresolved nonlinear phase shift is successfully obtained by means of a novel interferometer, polarization-division Sagnac interferometer (PSI). The PSI has a remarkable advantage of high stability owing to the commonpath configuration. In order to separate the phase and amplitude changes, the optical path difference is scanned between the probe and reference pulses making the best use of polarization. The time dependence of these changes is observed to be determined by the exciton lifetime. The PSI is a powerful method for characterization of ultrafast photonic devices.抄録全体を表示PDF形式でダウンロード (427K)
一般論文
レーザーオリジナル
-
溝口 竜二, 島田 義則, 篠原 秀則, 八ッ橋 知幸, 中島 信昭2004 年 32 巻 11 号 p. 717-721
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーThe ionization and fragmentation of 2,3-dimethyl-1,3-butadiene of a femtosecond laser have been studied at various pulse durations, which were changed from 35 fs to 1 ps. A reflectron-type time of flight mass spectrometer (TOF-MS) was used for ion detection. Molecules were ionized under a strong laser field and formed parent ions. Some were fragmented, resulting in a drastic increase of ionic species. Fragmentation was dominant when a long duration pulse was used, probably because the parent and large fragmented ions were further decomposed into small fragmented ions. Such heavy fragmentation may cause an underestimation of Isat.抄録全体を表示PDF形式でダウンロード (333K)
レーザーレクチュア
-
武岡 正裕, 佐々木 雅英2004 年 32 巻 11 号 p. 722-726
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーPDF形式でダウンロード (244K)
レーザーフラッシュ
-
興梠 元伸2004 年 32 巻 11 号 p. 727-728
発行日: 2004/11/15
公開日: 2010/01/12
ジャーナル フリーPDF形式でダウンロード (178K)
- |<
- <
- 1
- >
- >|