Two-photon selective excitation of phonon-mode in diamond using mid-infrared free-electron laser

被引：8
作者：
Sato, Oji [1 ]
Yoshida, Kyohei [2 ]
Zen, Heishun [3 ]
Hachiya, Kan [1 ]
Goto, Takuya [4 ]
Sagawa, Takashi [1 ]
Ohgaki, Hideaki [3 ]
机构：
[1] Kyoto Univ, Grad Sch Energy Sci, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan
[2] Univ Bordeaux, Inst Chem & Biol Membranes & Nanoobjects, 2 Rue Robert Escarpit, F-33607 Pessac, France
[3] Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan
[4] Doshisha Univ, Grad Sch Sci & Engn, 1-3 Tatara Miyakodani, Kyoto 6100394, Japan
来源：
PHYSICS LETTERS A | 2020年 / 384卷 / 10期
关键词：
Selective phonon-mode excitation; Free-electron laser; Raman scattering; Two-photon excitation; Diamond; COHERENT OPTICAL PHONONS; SUPERCONDUCTIVITY; SCATTERING; DYNAMICS;
D O I：
10.1016/j.physleta.2019.126223
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Two-photon selective excitation of an infrared (IR)-inactive phonon mode by a mid-infrared tunable free-electron laser (FEL) was accomplished. The mode-selective phonon excitation of IR-active mode by one-photon excitation using FEL (Yoshida et al. (2013) [20]) was extended to the IR-inactive mode excitation. The T-2g optical phonon mode in single-crystal diamond at 1.332 cm(-1) was selected, and the FEL photon energy corresponding to the oscillation wavelength was tuned to the half of the target phonon energy. The successful mode excitation was confirmed by anti-Stokes Raman scattering signal of T-2g for the sample at cryogenic temperature, where all other modes were suppressed. The signal was observed at T-2(g) phonon energy with red-shift of the peak to 1,306 cm(-1), which was accompanied by surface damage induced by intense laser irradiations. (C) 2019 Elsevier B.V. All rights reserved.
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页数：5
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