Optical control of coherent optical phonons in bismuth films
Optical control of coherent optical phonons in bismuth films
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DOI：
10.1063/1.117502
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发表时间：
1996-10-21
影响因子：
4
通讯作者：
Hangyo, M
中科院分区：
文献类型：
--
作者：
Hase, M;Mizoguchi, K;Hangyo, M
用双脉冲泵浦-探测技术研究了脉冲激发的相干声子在半金属中的干涉。当双脉冲的分离时间与声子振荡的周期匹配时，观察到A(1G)模的振荡幅度增强，当分离时间调节到声子振荡周期的一半时，观察到抵消。第二个脉冲后的幅度与分离时间呈正弦关系，这种关系可用两个相干声子振荡的叠加来解释。此外，通过电光采样不仅观察到了A(1g)模，而且还观察到了E(G)模。(C)1996年美国物理研究所。
Interference of impulsively excited coherent phonons in semimetals has been studied by using a double-pulse pump-probe technique. Enhancement of the oscillation amplitude of an A(1g) mode is observed when the separation time of the double-pulse is matched to the period of the phonon oscillation, and a cancellation is observed when the separation time is adjusted to half the period of the phonon oscillation. The amplitude after the second pulse shows a sinusoidal dependence as a function of the separation time, and this dependence is explained in terms of a superposition of two coherent phonon oscillations. In addition, not only the A(1g) mode but also an E(g) mode have been observed by electro-optic sampling. (C) 1996 American Institute of Physics.