TERAHERTZ BLOCH OSCILLATIONS IN SEMICONDUCTOR SUPERLATTICES

被引：11
|
作者：
DEKORSY, T
LEISCHING, P
WASCHKE, C
KOHLER, K
LEO, K
ROSKOS, HG
KURZ, H
机构：
[1] FRAUNHOFER INST APPL SOLID STATE PHYS, D-79108 FREIBURG, GERMANY
[2] TECH UNIV DRESDEN, INST ANGEW PHOTOPHYS, D-01062 DRESDEN, GERMANY
来源：
SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 1994年 / 9卷 / 11期
关键词：
D O I：
10.1088/0268-1242/9/11S/017
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The coherent excitation of excitonic wavepackets in AlGaAs/GaAs superlattices is investigated in a comparative study employing three different time-resolved optical techniques. The experimental results obtained in time-resolved four-wave mixing (FWM), THz emission spectroscopy and transmissive electro-optic sampling (TEOS) provide the final proof of the existence of Bloch oscillations in the THz range. Each of these measurements provides complementary information on these oscillations. As a result, Bloch oscillations appear as a special case of quantum interference involving the coherent superposition of Wannier-Stark states.
引用
收藏
页码：1959 / 1964
页数：6
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