MECHANISM FOR DISPLACIVE EXCITATION OF COHERENT PHONONS IN SB, BI, TE, AND TI2O3

被引:190
作者
CHENG, TK
VIDAL, J
ZEIGER, HJ
DRESSELHAUS, G
DRESSELHAUS, MS
IPPEN, EP
机构
关键词
D O I
10.1063/1.106187
中图分类号
O59 [应用物理学];
学科分类号
摘要
Coherent phonons in Sb, Bi, Te, and Ti2O3 can be generated impulsively, and detected in the time domain through reflectivity modulation using 60 fs pulses of laser light at 2 eV. Experimental data for these opaque solids suggest that a direct Raman excitation mechanism is not responsible for coherent phonon generation. Rather, the excitation is attributed to an electronically induced displacement of the ion equilibrium coordinates.
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页码:1923 / 1925
页数:3
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