Time-Resolved Optical Waveguide Experiments with Conjugated Polymers: Direct Measurement of the Magnitude and Sign of Third Order Non-linear Optical Susceptibility

共轭聚合物的时间分辨光波导实验：直接测量三阶非线性光学磁化率的幅度和符号

• 批准号: 9012808
• 负责人: Alan Heeger
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-11-01 至 1995-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9012808&HistoricalAwards=false
• 关键词: Time; Resolved; Optical; Waveguide; Experiments

This research involves an experimental study of nonlinear optical waveguides made from conjugated polymers. A punp-probe technique capable of picosecond time resolution will be employed to measure the intensity-dependent refractive indices of conjugated polymers such as p-phenylenevinylene (PPV) and its derivatives, polythienylenevinylene, the poly (3-alkylthiophenes) etc. for which waveguide quality thin films can now be fabricated. The technique can determine both the magnitude and sign of the third order nonlinear susceptibility. Determination of the sign is important in sorting out the different mechanisms.

本研究系关于共轭聚合物非线性光波导之实验研究。利用具有皮秒时间分辨能力的泵浦-探测技术测量了共轭聚合物的折射率随光强的变化，如PPV及其衍生物、聚噻吩亚乙烯、聚（3-烷基噻吩）等，这些聚合物可以用来制备波导质量的薄膜。该技术可以确定三阶非线性极化率的大小和符号。符号的确定对于区分不同的机制很重要。