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

被引：0
|
作者：
A. Bhatnagar
D. W. E. Allsopp
R. Grey
机构：
[1] University of York,Department of Electronics
[2] University of Bath,Department of Electronic Engineering
[3] University of Sheffield,EPSRC III
来源：
Optical and Quantum Electronics | 1999年 / 31卷
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：
暂无
中图分类号：
学科分类号：
摘要：
The Wannier–Stark effect has been investigated in strongly coupled three quantum well structures and 23.5 period superlattices consisting of 25 Å 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 (Δe+Δhh)/2, where Δe and Δhh are the electron and heavy hole miniband widths respectively, produced by Wannier–Stark localization in superlattices.
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页码：1189 / 1206
页数：17
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