Coherent acoustic phonons in semiconductor superlattices

被引：0
|
作者：
Dekorsy, T
Bartels, A
Kurz, H
Mizoguchi, K
Nakayama, M
Köhler, K
机构：
[1] Rhein Westfal TH Aachen, Inst Halbleitertechn, D-52056 Aachen, Germany
[2] Osaka City Univ, Dept Appl Phys, Sumiyoshi Ku, Osaka 5588585, Japan
[3] Fraunhofer Inst Angew Festkorperphys, D-79108 Freiburg, Germany
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1999年 / 215卷 / 01期
关键词：
D O I：
10.1002/(SICI)1521-3951(199909)215:1<425::AID-PSSB425>3.3.CO;2-F
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We investigate the excitation of coherent acoustic phonons in GaAs/AlAs superlattices with femtosecond laser pulses. Zone-folded acoustic modes of different order are observed in the time-domain. The excitation of the modes is based on an impulsive stimulated Raman process. The coherent phonon amplitudes can be traced over more than 100 ps which allows us to distinguish propagation and decay of the phonons. The corresponding linewidths of the time-domain data are below <0.2 cm(-1) in the frequency domain. This is a new approach for high resolution spectroscopy of low energy phonons in semiconductors.
引用
收藏
页码：425 / 430
页数：6
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