The Ultrastructure Synthesis and Nonlinear Spectroscopy of Photonic Materials

9528021道尔顿飞秒和皮秒非线性光学光谱学（包括相位失配光谱学）的新发展技术被用于定义由光激发激活的电子和核动力学过程对π电子材料的光学非线性的贡献。 该信息用于优化由这些新合成的π电子发色团制造的器件的性能（并定义操作限制）。 利用光化学加工和反应离子刻蚀等技术在这些聚合物中制备了埋沟非线性光波导。 提出了一种新的多色光刻技术，用于解决窄尺寸电光调制器波导与大尺寸光纤耦合的问题。 通过系统地优化发色团超极化率、聚合物晶格中的发色团数密度、发色团排序和最终聚合物晶格的玻璃化转变温度，可以预见，聚合物材料的电光系数超过50 μ m/s，V，并且其特征在于在超过125摄氏度的温度下的长期热稳定性，可以制备并加工成适当的集成聚合物/半导体光子晶体。电子设备。 这样的材料将代表比用于低频调制应用的当前可用材料的显著进步。 ***

9528021 Dalton Newly developed techniques of femtosecond and picosecond nonlinear optical spectrosocopy (including phase-mismatch spectroscopy) are used to define the contributions made to the optical nonlinearity of pi-electron materials by electronic and nuclear dynamical processes activated by photoexcitation. This information is used to optimize the performance (and define the operational limitations) of devices fabricated from these newly synthesized pi-electron chromophores. Buried channel nonlinear optical waveguides are fabricated in these polymers by a variety of of techniques including photochemical processing and reactive ion etching. A novel multi-color photolithography technique is proposed to solve problems of coupling narrow dimension electro-optic modulator waveguides to larger dimension fiber optic cables. %%% By systematically optimizing chromophore hyperpolarizability, chromophore number density in the polymer lattice, chromophore ordering, and the glass transition temperature of the final polymer lattice, it is anticipated by polymeric materials exhibiting electro-optic coefficients in excess of 50 pm/V and characterized by long term thermal stabilities at temperatures in excess of 125 degrees celsius can be prepared and processed into appropriate integrated polymer/semiconductor photonic/electronic devices. Such materials would represent a significant advance over currently available materials for low frequency modulation applications. ***