Systematics of two-wave mixing in a photorefractive polymer
Systematics of two-wave mixing in a photorefractive polymer
复制标题
光折变聚合物中两波混频的系统学
DOI：
10.1364/josab.15.000905
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发表时间：
1998
影响因子：
1.9
通讯作者：
W. Moerner
中科院分区：
文献类型：
--
作者：
A. Grunnet;C. L. Thompson;W. Moerner
利用光学二波混频特性测量技术结合光栅平移技术对高性能光折变聚合物复合材料PVK：PDCST：BBP：C60进行了详细的研究。根据相移对光栅间距和外加电场的依赖性，估计出较大的有效陷阱密度Neff=1.5×1017 cm-3。取向增强的理论被成功地用来解释所观察到的光折变响应，并在这个低玻璃化转变温度系统的折射率的调制被证明是干主要从双折射的空间调制。
The high-performance photorefractive polymer composite PVK:PDCST:BBP:C60 is investigated in detail by use of optical two-wave mixing characterization measurements in conjunction with the grating translation technique for determination of the photorefractive phase shift. A large effective trap density of Neff=1.5×1017 cm-3 is estimated from the dependence of the phase shift on the grating spacing and the applied electric field. The theory of orientational enhancement is successfully used to explain the observed photorefractive response, and in this low-glass-transition temperature system the modulation of the refractive index is shown to stem primarily from the spatial modulation of the birefringence.