New Polymeric Materials for Nonlinear Optical Applications

新的非线性光谱技术（干涉和多光谱） 色简并四波混频），以及毫微微和皮科 第二常规非线性电光调制 测量，用于定义光学的机制 新合成的无金属和金属化梯形的非线性 共聚物，金属化大环聚合物，噻吩基多烯 共聚物、混合价态分子（溶液中）和聚合物， 光合反应中心和相关模型化合物，以及 富勒烯 共聚物合成技术用于克服 梯形、大环和 噻吩基多烯材料，以延缓 混合价态和噻吩基多烯材料，以控制 分子间相互作用，并允许测量材料 在可比的当地实地条件下。 处理电子 和核动力学以及应用的细节 电磁场的密度矩阵方法允许 表征的光学非线性的多种机制， 单一材料。 大型光学仪器的初步实现 非线性表明，随着材料的进一步优化 有机、无机和混合物的性能器件应用 价态聚合物可能是实用的。 本研究将非线性光学材料的合成， 最先进的表征和测量，以及 光学非线性的机制。 补助金得到支持 由聚合物和固态化学成分联合组成， 固态化学和聚合物计划。

New nonlinear spectroscopic techniques (interferometric and multi- color degenerate four wave mixing), together with femto and pico second conventional nonlinear and electro-optic modulation measurements, with be used to define mechanisms of optical nonlinearity in newly synthesized metal free and metallated ladder copolymers, metallated macrocyclic polymers, thienylpolyene copolymers, mixed valence molecules (in solution) and polymers, the photosynthetic reaction center and related model compounds, and in fullerenes. Copolymer synthesis techniques are used to overcome intrinsically poor solubility of ladder, macrocyclic, and thienylpolyene materials, to retard photochemical degradation of mixed valence and thienylpolyene materials, to control intermolecular interactions and to permit measurement of materials under comparable local field conditions. Treatment of electronic and nuclear dynamics as well as the details of the applied electromagnetic fields by density matrix methods permits characterization of multiple mechanisms of optical nonlinearity in a single material. Preliminary realization of large optical nonlinearities suggest that, with further optimization of material properties device application of organic, inorganic and mixed valence polymers, may be practical. This research on nonlinear optical materials combines synthesis, state-of-the-art characterization and measurements, and study of the mechanisms of optical nonlinearity. The grant is supported jointly by the Polymers and the Solid State Chemistry components of the Solid State Chemistry and Polymers Program.