Wannier-Stark effect in strongly coupled three quantum well structures and superlattices

被引：1

作者：

Bhatnagar, A ^{[1
]}

Allsopp, DWE

Grey, R

机构：

[1] Univ York, Dept Elect, York, N Yorkshire, England

[2] Univ Sheffield, Dept Elect & Elect Engn, EPSRC III V Semicond Facil, Sheffield S1 3JD, S Yorkshire, England

来源：

OPTICAL AND QUANTUM ELECTRONICS | 1999年 / 31卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

blue shift; coupled quantum wells; Stark ladders; strongly coupled superlattices; three coupled quantum wells; Wannier-Stark effect; Wannier-Stark localization;

D O I：

10.1023/A:1007058925698

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 Wannier-Stark effect has been investigated in strongly coupled three quantum well structures and 23.5 period superlattices consisting of 25 Angstrom wide GaAs wells separated by Al0.25Ga0.75As barriers of the same width. A blue shift associated with the Wannier-Stark localization of heavy holes states is observed for the first time, followed by a second blue shift at higher electric fields due to the electron localization. This is contrary to the widely reported single blue shift of the order of (Delta e+Delta hh)/2, where Delta e and Delta hh are the electron and heavy hole miniband widths respectively, produced by Wannier-Stark localization in superlattices.

引用

页码：1189 / 1206

页数：18

共 23 条

[1] COHERENCE AND LOCALIZATION IN SUPERLATTICES UNDER ELECTRIC-FIELDS [J].