COHERENT PHONON DETECTION FROM ULTRAFAST SURFACE VIBRATIONS
COHERENT PHONON DETECTION FROM ULTRAFAST SURFACE VIBRATIONS
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DOI:
10.1103/physrevlett.69.1668
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发表时间:
1992-09-14
影响因子:
8.6
通讯作者:
KAWASHIMA, K
中科院分区:
文献类型:
--
作者:
WRIGHT, OB;KAWASHIMA, K
Using an optical technique, ultrafast vibrations of the surface of thin opaque films in the 0.1-THz range have been directly observed in the time domain. We propose a new type of phonon detection by monitoring the surface velocity, and demonstrate an exceptional sensitivity to atomic-scale inhomogeneities by observing an anomalous reflection from a buried film of monolayer order in thickness.