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Anharmonic phonon-polariton dynamics in ferroelectric LiNbO3 studied with single-shot pump-probe imaging spectroscopy
http://hdl.handle.net/10131/00012046
http://hdl.handle.net/10131/00012046471778a0-bcd6-410f-9146-21d59d5380b2
名前 / ファイル | ライセンス | アクション |
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JAP-123-174103-2018.pdf (3.0 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2018-11-02 | |||||
タイトル | ||||||
タイトル | Anharmonic phonon-polariton dynamics in ferroelectric LiNbO3 studied with single-shot pump-probe imaging spectroscopy | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Kuribayashi, T
× Kuribayashi, T× Motoyama, T× Arashida× Katayama, Ikufumi× Takeda, Jun |
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著者所属 | ||||||
Department of Physics, Faculty of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Faculty of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Faculty of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Faculty of Engineering, Yokohama National University | ||||||
著者所属 | ||||||
Department of Physics, Faculty of Engineering, Yokohama National University | ||||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We demonstrate that single-shot pump-probe imaging spectroscopy with an echelon mirror enables us to disclose the ferroelectric phonon-polariton dynamics across a wide temperature range from 10 K to 375 K while avoiding the photorefractive effects that appear prominently at low temperatures. The E-mode phonon-polaritons corresponding to the two transverse optical modes, TO1 and TO3, up to ∼7 THz were induced in LiNbO3 through an impulsive stimulated Raman scattering process. Subsequently, using single-shot pump-probe imaging spectroscopy over a minimal cumulative time, we successfully visualized the phonon-polariton dynamics in time-wavelength space even at low temperatures. We found that the phase-matching condition significantly affected the observed temperature-dependent phonon-polariton frequency shift. The anharmonicity of the TO1 and TO3 modes was then evaluated based on an anharmonic model involving higher-order interactions with acoustic phonons while eliminating the influence of the frequency shift due to the phase-matching condition. The observed wavenumber-dependent damping rate was analyzed by considering the bilinear coupling of the TO1 or TO3 modes with the thermally activated relaxation mode. We found that the phonon-polariton with a higher frequency and wavenumber had a higher damping rate at high temperatures because of its frequent interaction with the thermally activated relaxation mode and acoustic phonons. The TO3 mode displayed greater bilinear coupling than the TO1 mode, which may also have contributed to the observed high damping rate. Thus, using our unique single-shot spectroscopy technique, we could reveal the overall anharmonic characteristics of the E-mode phonon-polaritons arising from both the acoustic phonons and the relaxation mode. | |||||
書誌情報 |
Journal of Applied Physics 巻 123, 号 17, p. 174103-1-174103-8, 発行日 2018-05-07 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00218979 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1063/1.5021379 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | AIP Publishing. |