DMNPAA有机光折变材料的性能研究  

Properties of DMNPAA Organic Photorefractive Material

作　　者：张学明[1] 叶嘉雄[1] 关荣峰 周云 

机构地区：[1]华中理工大学光电子工程系

出　　处：《光学学报》1997年第6期813-816,共4页Acta Optica Sinica

摘　　要：通过双波耦合实验证明在一种新的有机聚合物光折变材料中双波耦合增益系数超过吸收系数。１０５μｍ厚的样品衍射效率可达到８６％，光栅形成的响应时间达到１００ｍｓ量级，双波耦合增益系数超过了２００ｃｍ－１［１］。In a new organic polymer photorefractive material, the two beam coupling experiment demenstrates that the gain coefficients of two beam coupling exceed the absorption coefficient. The measured maxium diffraction efficiency is high to 86% in a 105 μm thick polymer film. The grating growth response time is in the order of 100 ms. The material also exhibits a net gain of two beam coupling over 200 cm -1 . A new way to analysis the photorefractive mechanism is suggested.

关 键 词：有机材料 光折变 光导聚合物 DMNPAA 

分 类 号：O437[机械工程—光学工程]