Spectrally resolved detection in transient-reflectivity measurements of coherent optical phonons in diamond
Spectrally resolved detection in transient-reflectivity measurements of coherent optical phonons in diamond
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金刚石相干光学声子瞬态反射率测量中的光谱分辨检测
DOI：
10.1103/physrevb.94.024303
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
and Yosuke Kayanuma
中科院分区：
文献类型：
--
作者：
Kazutaka G. Nakamura,Kazuma Ohya,Hiroshi Takahashi,Tetsuya Tsuruta,Hiroya Sasaki;Shin-ichi Uozumi;Katsura Norimatsu;Masahiro Kitajima;Yutaka Shikano;and Yosuke Kayanuma
块状固体系统中的相干光学声子在理解和设计光-物质相互作用中起着至关重要的作用，并且可以通过瞬态反射率测量来检测。在本文中，我们展示了利用光学带通滤波器从超短红外泵浦探测测量中光谱分辨检测金刚石中的相干光学声子。结果表明，该方法测量瞬态反射率相干振荡的灵敏度比常用的光谱积分测量方法提高了约35倍。为了解释这一现象，我们讨论了其机制。
Coherent optical phonons in bulk solid systems play a crucial role in understanding and designing light-matter interactions and can be detected by the transient-reflectivity measurement. In this paper, we demonstrate spectrally resolved detection of coherent optical phonons in diamond from ultrashort infrared pump-probe measurements using optical bandpass filters. We show that this enhances the sensitivity approximately 35 times in measuring the coherent oscillations in the transient reflectivity compared with the commonly used spectrally integrated measurement. To explain this observation, we discuss its mechanism.