Acoustic pulse echoes probed with time-resolved x-ray triple-crystal diffractometry

被引：19
|
作者：
Hayashi, Y [1 ]
Tanaka, Y
Kirimura, T
Tsukuda, N
Kuramoto, E
Ishikawa, T
机构：
[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan
[2] Kyushu Univ, Res Inst Appl Mech, Kasuga, Fukuoka 8168580, Japan
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 11期
关键词：
D O I：
10.1103/PhysRevLett.96.115505
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Acoustic pulse echoes generated by femtosecond laser irradiation were detected using time-resolved x-ray triple-crystal diffractometry. The determined time-dependent longitudinal strain component for pulse echoes in silicon and gallium arsenide plates showed that the polarity of the strain pulse was dependent on the optically induced initial stress, and that the bipolar pulse waveform was gradually deformed and broadened in the course of propagation. The three-dimensional wave front distortion of pulse echoes was shown simply as the pulse duration broadening, which was consistent with a boundary roughness for an unpolished plate.
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页数：4
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