COHERENT AND INCOHERENT TUNNELING IN ASYMMETRIC DOUBLE QUANTUM-WELLS

被引：33

作者：

LEO, K

SHAH, J

GOBEL, EO

GORDON, JP

SCHMITTRINK, S

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

[2] AT&T BELL LABS,HOLMDEL,NJ 07733

来源：

SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 1992年 / 7卷 / 3B期

关键词：

D O I：

10.1088/0268-1242/7/3B/103

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：

We discuss tunnelling processes in double quantum well structures in two limiting cases. Firstly, we report the coherent oscillations of a photogenerated electronic wavepacket between the wells. The THz oscillations are traced by an optical pump-probe as well as by four-wave-mixing spectroscopy. A comparison with theory shows that the two experiments give complementary information about the various relaxation processes. Secondly, we discuss hole tunnelling in weakly coupled wells as an example of resonant tunnelling in the limit of strong scattering. The experimental and theoretical results show that the resonant tunnelling process is considerably slowed down by the scattering and relaxation processes.

引用

收藏

页码：B394 / B400

页数：7

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