光电离对分子材料光限幅行为的影响  

EFFECT OF OPTICAL IONIZATION ON OPTICAL LIMITING PROPERTIES OF MOLECULAR MATERIALS

作　　者：周勇[1] 谢震[1] 马勇[1] 

机构地区：[1]山东师范大学物理与电子科学学院,济南250014

出　　处：《山东师范大学学报（自然科学版）》2011年第1期39-41,共3页Journal of Shandong Normal University(Natural Science)

基　　金：国家自然科学基金资助项目（10974121）.

摘　　要：以4,4＇-二（二苯基氨基）苯乙烯（BDPAS）分子体系为研究对象,通过采用时域有限差分法和预估矫正法数值求解Maxwell-Bloch方程,模拟了飞秒激光脉冲在该分子介质中的传播过程,研究了光电离对分子材料光限幅行为的影响.结果表明,光电离对光限幅行为的影响与传播距离、输入光强强度有着密切的关系.在传播距离足够远和入射光强足够大的情况下,光电离有利于增强分子材料的光限幅效应.Taking 4,4＇ - bis （diphenylamino） stilbene molecule as medium, we study the interaction between the pulse and the medium by numerically solving the Maxwell - Bloch equations using an iterative predictor - corrector and finite - difference time - domain method. The influences of ionization on properties of optical limiting are investigated. The results show that effect of ionization on optical limiting properties is closely related to the propagation distances and pulse intensity. When the propagation distance is larger and the input pulse intensity is strong enough, the ionization effect is favorable for the optical limiting.

关 键 词：电离 光限幅效应 双光子吸收 

分 类 号：O437[机械工程—光学工程]