Theoretical study on grating formation in photovoltaic photorefractive LiNbO3 crystal with short light pulses

被引：1
|
作者：
Yang, B [1 ]
Yan, X [1 ]
Yu, BK [1 ]
机构：
[1] Shanghai Univ, Coll Sci, Dept Phys, Shanghai 200444, Peoples R China
来源：
OPTICAL AND QUANTUM ELECTRONICS | 2005年 / 37卷 / 08期
基金：
中国国家自然科学基金;
关键词：
instantaneous approximation; photorefractive effect; photovoltaic effect; quasi-cw approximation; space charge field; time constants;
D O I：
10.1007/s11082-005-8340-x
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：
Based on Valley's quasi-cw approximation, the grating formation in materials exhibiting bulk photovoltaic effect on illumination with short light pulses (such as ns pulses) is investigated. We give the expression of the space-charge field, and find that it has two time constants. When considering and not considering the photovoltaic effect, the diagrams of two time constants as a function of irradiance in units of 1/(s tau(R)) are the same. The energy required to erase a grating to 1/e of its initial value is also studied in the two cases. The two results are also the same.
引用
收藏
页码：723 / 733
页数：11
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