Materials World Network: Non-linear photonic crystals based on inorganic/organic hybrid systems

本项目旨在设计、制造和表征与硅技术兼容的非线性光子晶体（PhCs）模块化组装系统。它们将基于主要在硅（Si）基质中排列的大孔的扩展单畴，但也可以在可见光范围内的应用中使用二氧化钛（TiO 2）。孔将渗透有意识地设计的一组有机和聚合物材料，其具有基于亚苯基乙炔基序的发色团，表现出非线性光学（NLO）行为。此外，这些材料的光学性质将在分子水平和本体聚合物水平上进行探测。我们将从理论上评估非线性光子晶体管的各种设计。特别注意将支付给特定的超分子结构的模塑材料的控制生成。这些棒状分子的聚合度的系统变化和2个相应的混合物与光学非活性载体聚合物的调查的目的是在剪裁的浓度，分散和取向分布的发色团。我们计划研究渗透和中间相形成的机制，旨在实现特定的生色团在宏观尺度上的取向。具有特定NLO缺陷结构（例如波导）的光子晶体将通过用NLO材料选择性地填充各个孔来制备。这些波导结构将允许光-光切换和选择性发射。

This project aims at the design, fabrication and characterization of a modular assembly system of non-linear photonic crystals (PhCs) compatible with silicon technology. They will be based on extended monodomains of aligned macropores mainly in silicon (Si) matrices, but also in titania (TiO2) for applications in the visible range. The pores will be infiltrated with a consciously designed set of organic and polymeric materials with chromophores based on the phenylene ethynylene motif, exhibiting non-linear optical (NLO) behavior. Additionally, the optical properties of these materials will be probed on the molecular level and bulk polymer level. We will theoretically evaluate various designs for non-linear PhCs. Particular attention will be paid to the controlled generation of specific supramolecular architectures of the molded material. The systematic variation of the degree of polymerization of these rod-shaped molecules and the investigation of 2 corresponding mixtures with optically inactive carrier polymers aims at the tailoring of the concentration, dispersion and orientational distribution of the chromophores. We plan to study the mechanisms of infiltration and mesophase formation aiming at the realization of specific chromophore orientations on a macroscopic scale. PhCs with specific NLO defect structures, such as waveguides, will be prepared by selectively filling individual pores with NLO materials. These wave-guiding structures will allow opto-optical switching and selective emission.