SBIR Phase II: Novel Polymeric Photorefractive Materials for Optical Image Processing

SBIR 第二阶段：用于光学图像处理的新型聚合物光折变材料

• 批准号: 9510017
• 负责人: Lian Li
• 金额: $ 29.21万
• 依托单位: Molecular Technologies Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-15 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510017&HistoricalAwards=false
• 关键词: SBIR; Phase; II; Novel; Polymeric

*** 9510017 Li This Small Business Innovation Research Phase II project will develop practical polymeric photorefractive materials based on conjugated polymers for optical image processing. The proposed research will focus on design, synthesis, and processing of conjugated polymer-based photorefractive materials with large optical nonlinearities, high photoconductivity and large charge carrier mobilities. The results obtained from Phase I demonstrated that polythiophene-based conjugated polymers with nonlinear optical (NLO) functionalities can exhibit the photorefractive effect. Large two beam coupling (TBC) gain coefficient has been measured. Based on the Phase I effort, the Phase II research will concentrate on the enhancement of the photorefractive properties of conjugated polymer-based materials. Several approaches are proposed to boost up the electro-optic coefficients and the photoconductivity of the materials. In addition, the intrinsically large charge carrier mobilities in the conjugated polymers are expected to provide an edge over currently existing polymeric photorefractive materials. These conjugated materials will be characterized for their linear optical and NLO properties, photoconductivity, as well as the charge carrier mobility. TBC and degenerate four wave mixing (FWM) experiments will be carried out to study the photorefractive properties of the materials. These novel materials are expected to surpass the polymeric photorefractive materials so far reported both in speed and sensitivity. To demonstrate the application of the novel photorefractive materials for information storage and image processing, holographic image recording and retrieval experiments will be performed on these materials. Development of practical polymeric photorefractive materials would yield an inexpensive and efficient holographic recording medium for waveguide photorefractive technologies, with applications in the areas of real-time image processing, high-density optical data sto rage, holographic optical interconnects, associative memories, phase conjugation, optical incoherent to coherent converters and beam steering. Also, such materials are suited for devices for industrial control and automation, based on real-time optical interferometry. ***

*** 9510017 Li 这个小型企业创新研究第二期项目将开发基于共轭聚合物的实用聚合光折变材料，用于光学图像处理。 拟议的研究将集中于具有大光学非线性、高光电导率和大载流子迁移率的共轭聚合物基光折变材料的设计、合成和加工。 第一阶段的结果表明，具有非线性光学（NLO）功能的聚噻吩基共轭聚合物可以表现出光折变效应。 已测量大的两光束耦合 (TBC) 增益系数。在第一阶段工作的基础上，第二阶段研究将集中于增强共轭聚合物基材料的光折变性能。 提出了几种方法来提高材料的电光系数和光电导率。 此外，共轭聚合物中固有的大电荷载流子迁移率预计将提供优于现有聚合物光折变材料的优势。 这些共轭材料的特征在于其线性光学和非线性光学特性、光电导性以及载流子迁移率。 将进行TBC和简并四波混频（FWM）实验来研究材料的光折变特性。 这些新型材料有望在速度和灵敏度方面超越迄今为止报道的聚合物光折变材料。 为了展示新型光折变材料在信息存储和图像处理方面的应用，将对这些材料进行全息图像记录和检索实验。 实用聚合物光折变材料的开发将为波导光折变技术提供廉价且高效的全息记录介质，并应用于实时图像处理、高密度光学数据存储、全息光学互连、关联存储器、相位共轭、光学非相干到相干转换器和光束控制。 此外，此类材料适用于基于实时光学干涉测量的工业控制和自动化设备。 ***