Disordered photonic structures in organic microlasers

微腔是研究有序光子结构向无序光子结构转变的理想模型系统，而且它直接导致了有趣的应用前景。因此，本项目的目的是研究金属-有机微腔(MC)的附加横向图案化，从而导致对有机微激光器中的自发辐射和受激发射模式的空间、角度和光谱控制。我们计划从这类MC内部的单根光子线和周期线阵列开始，引入精细可调的缺陷来增强光的俘获，增加光态密度，最终导致器件特性的改善，如降低有机激光器的激光阈值。此外，还将研究非周期和类准晶体图案，利用高分辨率的近场和远场光谱，系统地研究从周期到非周期到完全无序的图案的转变，并绘制这些腔中的时间场发展图。最后，对这种金属图案在MC发光二极管和半导体激光器中用于载流子注入的适用性进行了研究。这一项目的结果应该为新型或显著改进的光子器件提供基础。

Microcavities are an ideal model system to investigate the transition from ordered to disordered photonic structures, furthermore, they immediately lead to interesting application perspectives. The aim of this project is thus the investigation of metal-organic microcavities (MCs) with additional lateral patterning leading to a spatial, angular, and spectral control of the spontaneous and stimulated emission modes in organic microlasers. Starting from single photonic wires and periodic wire arrays inside of such MCs, we plan to introduce finely tunable defects enhancing trapping of light, increasing the density of optical states, and finally leading to improved device characteristics such as a decrease of lasing thresholds in organic lasers. Furthermore, aperiodic and quasi-crystal-like patterning is to be investigated, with a systematic study of the transition from periodic to aperiodic to completely disordered patterns, utilizing high-resolution near and far field spectroscopy as well as mapping the temporal field development in such cavities. Finally, the suitability of such metallic patterns for charge carrier injection in MC-light emitting diodes and -lasers is to be investigated. The results of this project should provide a basis for novel or significantly improved photonic devices.