Space-charge electric field in photorefractive multiple quantum wells

被引：3

作者：

Zhang, Xiangxue ^{[1
,3
]}

Samiullah, Mohammad ^{[2
,3
]}

Yu, Ping ^{[3
]}

机构：

[1] Beijing Forestry Univ, Coll Sci, Beijing 100083, Peoples R China

[2] Truman State Univ, Dept Phys, Kirksville, MO 63501 USA

[3] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 15期

基金：

美国国家科学基金会;

关键词：

aluminium compounds; gallium arsenide; III-V semiconductors; optical modulation; photoconductivity; photorefractive materials; semiconductor quantum wells; space charge; TRANSPORT; HOLOGRAMS;

D O I：

10.1063/1.3367728

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed a graphical method to determine the space-charge electric field in photorefractive multiple quantum wells when the photocurrent is dominated by the drift current. The minima and maxima of the space-charge electric field due to space modulated light intensity are obtained from photocurrent measurements under uniform illumination. In addition, we find that the space-charge field depends nonlinearly on the applied electric field and the intensity of light, and changes sharply with the intensity up to a critical intensity beyond which it remains unchanged.

引用

页数：3

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