Minority Research Planning Grant: Precision Poling of Dye-Doped Polymers Using Ion Beam Irradiation

少数派研究计划资助：使用离子束辐照对染料掺杂聚合物进行精密极化

• 批准号: 9706398
• 负责人: Fassil Ghebremichael
• 金额: $ 1.71万
• 依托单位: United States Air Force Academy
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-06-01 至 1998-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706398&HistoricalAwards=false
• 关键词: Minority; Research; Planning; Grant; Precision

9706398 Ghebremichael The effects of implantation of light ions in nonlinear optical polvmers will be studied. The optical nonlinearity in the polymers is achieved by doping the optically inactive polymers with nonlinear optical chromophores. Nonlinear optical polymers, when first processed, usually have an isotropic bulk svmmetry. For such polymers to be used in second order nonlinear optical applications, where bulk asymmetry is required, the configuration of the chromophores has to be altered. The orientational orders of the ion irradiation-induced orientational order is expected to be large because the ion deposition depth, thus any chemical or physical reaction, is highly localized and determined by the ion beam energy. The relaxation time after ion implantation induced order is also expected to significantly increase, compared with the techniques currently employed, because this method is virtually temperature independent. Nonlinear optical studies, such as second harmonic generation, electrooptic effect, and z-scan techniques will be used to estimate the degree of ion irradiation induced asymmetry in bulk samples and waveguide devices. Furthermore, standard studies of linear optical and mechanical properties should reveal the effects of the irradiation on the integrity of the poled systems. ***

9706398 Ghebrmichael 将研究轻离子注入非线性光学聚合物中的影响。 聚合物中的光学非线性是通过用非线性光学发色团掺杂光学非活性聚合物来实现的。 非线性光学聚合物在首次加工时通常具有各向同性的体积对称性。 对于要在需要体积不对称性的二阶非线性光学应用中使用的此类聚合物，必须改变发色团的构型。 预计离子辐射引起的取向序的取向序会很大，因为离子沉积深度以及任何化学或物理反应是高度局域化的并且由离子束能量决定。 与目前采用的技术相比，离子注入诱导有序后的弛豫时间预计也会显着增加，因为该方法实际上与温度无关。 非线性光学研究，例如二次谐波产生、电光效应和 z 扫描技术，将用于估计大块样品和波导装置中离子辐照引起的不对称程度。 此外，线性光学和机械性能的标准研究应该揭示辐照对极化系统完整性的影响。 ***