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 这个小企业创新研究第二阶段项目将开发基于共轭聚合物的实用聚合物光折变材料，用于光学图像处理。 本论文的主要研究方向是设计、合成和加工具有大光学非线性、高光电导和大载流子迁移率的共轭聚合物基光折变材料。 从第一阶段得到的结果表明，聚噻吩基共轭聚合物与非线性光学（NLO）功能可以表现出光折变效应。 测量了大的双光束耦合增益系数。基于第一阶段的努力，第二阶段的研究将集中在共轭聚合物基材料的光折变性能的增强。 提出了几种提高材料电光系数和光电导的方法。 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超过目前现有的聚合物光折变材料的优势。 这些共轭材料的特征在于它们的线性光学和非线性光学特性，光电导性，以及电荷载流子迁移率。 利用TBC和简并四波混频（FWM）实验研究了材料的光折变特性。 这些新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。 为了演示新型光折射材料在信息存储和图像处理中的应用，将对这些材料进行全息图像记录和检索实验。 开发实用的聚合物光折变材料将为波导光折变技术提供一种廉价、高效的全息记录介质，在实时图像处理、高密度光数据存储、全息光互连、关联存储、相位共轭、光非相干到相干转换器和光束控制等领域具有广泛的应用。 此外，这种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。 ***