arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.04515cond-mat.mtrl-sci
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飞秒laser脉冲对铁石榴石中相干光学声子的激发

Excitation of coherent optical phonons in iron garnet by femtosecond laser pulses

Pritam Khan, Masataka Kanamaru, Wei-Hung Hsu, Minori Kichise, Yasuhiro Fujii, Akitoshi Koreeda, Takuya Satoh

摘要:

利用飞秒泵浦探测技术研究了铁石榴石中相干光学声子的动力学行为。一个现象学的基于量子力学的考虑揭示了太赫兹T2g模式的振荡被激发。通过线偏振泵浦的选择性激发和圆偏振探针的探测证实了脉冲受激拉曼散射(ISRS)是相干声子的驱动力。从ISRS测量获得的实验结果显示出良好的协议与自发拉曼光谱数据,分析考虑声子模式的对称性和相应的激发和检测选择规则。

英文摘要:

We employed femtosecond pump probe technique to investigate the dynamics of coherent optical phonons in iron garnet. A phenomenological symmetry-based consideration reveals that oscillations of the terahertz T2g mode are excited. Selective excitation by a linearly polarized pump and detection by a circularly polarized probe confirm that impulsive stimulated Raman scattering (ISRS) is the driving force for the coherent phonons. Experimental results obtained from ISRS measurements reveal excellent agreement with spontaneous Raman spectroscopy data, analyzed by considering the symmetry of the phonon modes and corresponding excitation and detection selection rules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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