Novel Polymeric Photorefractive Material for Optical Data Processing

9361272 Lian Real Time薄膜全息元件是许多光学数据处理技术的关键部件。有必要开发材料来记录永久的和可重构的全息图。近年来，聚合物光折射率材料作为一种廉价的全息介质引起了人们的广泛关注。我们建议开发一种新的聚合物光折射率材料，有望在速度和灵敏度上超过迄今为止报道的聚合物光折射率材料。本研究提出的高分子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发色团和交联基团功能化，在极化和交联后提供稳定的二阶非线性。电荷输运和介电常数可以通过适当选择掺杂剂来调整。合成的光折变聚合物将被纯化并加工成薄膜。这些材料将以其线性和非线性光学性质和光导电性来表征。衍射效率的测量将被执行，以评估这些材料作为动态全息介质。

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.