Optically induced blueshift of photoluminescence excitation spectrum in n-i-p-i multiple quantum well structures

被引:0
|
作者
Tang, XH
Chua, SJ
Zhang, BL
Zhu, JY
Huang, GS
机构
[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Microelect Div, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Dept Elect Engn, Ctr Optoelect, Singapore 2263, Singapore
[3] Nanyang Technol Univ, Sch Elect & Elect Engn, Microelect Div, Singapore 2263, Singapore
关键词
n-i-p-i MQW structure; step-quantum well; photoluminescence excitation;
D O I
10.1016/S0749-6036(03)00003-X
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
In this paper, the nonlinear optical properties of hetero n-i-p-i multiple quantum well (MQW) structures are investigated through a two-beam photoluminescence excitation (PLE) measurement. A large blue shift of the PLE spectra of n-i-p-i MQW structures has been observed when the optical excitation power intensity is varied from as low as similar to1 mW cm(-2) to similar to10 W cm(-2). This nonlinear optical modulation has been enhanced much by using multiple step-quantum wells to replace normal rectangular quantum wells in the n-i-p-i MQW structure. The experimental results agree well with our theoretical model. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:135 / 144
页数:10
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