Novel Polymeric Photorefractive Material for Optical Data Processing

9361272连实时薄膜全息元件是许多光学数据处理技术中的关键部件。需要开发记录永久全息图和可重新配置全息图的材料。近年来，聚合物光折变材料作为廉价的全息介质引起了人们的极大兴趣。我们建议开发一类新的聚合物光折变材料，有望在速度和灵敏度方面超过迄今报道的聚合物光折变材料。本文提出的聚合物材料是具有半导体特性的共轭聚合物。这些聚合物被二阶非线性光学生色团和交联基功能化，以在极化和交联化后提供稳定的二阶非线性。通过选择合适的掺杂剂，可以调节薄膜的电荷传输和介电常数。合成的光折变聚合物将被提纯并加工成薄膜。这些材料将以其线性和非线性光学性质以及光导性进行表征。将进行衍射效率测量，以评估作为动态全息介质的这些材料。

9361272 Lian Real Time thin film holographic elements are crucial components in a number of optical data processing technologies. There is a need for development of materials to record both permanent and re configurable holograms. Recently, polymeric photo refractive materials have evoked a lot of interest as inexpensive holographic media. We propose to develop a new class of polymeric photo refractive materials which are expected to surpass the polymeric photo refractive materials so far reported both in speed and sensitivity. The polymeric materials proposed in this work are conjugated polymers which have characteristics of a semiconductor. These polymers are functionalized with second order nonlinear optical chromophores and cross linking groups to provide stable second order nonlinerity after poling and cross linking. Charge transport and dielectric constant can be tailored by appropriate choice of dopants. The photo refractive polymer synthesized will be purified and processed into thin films. These materials will be characterized for their linear and nonlinear optical properties and photo conductivity. Diffraction efficiency measurements will be performed to evaluate these materials as a dynamic holographic medium.