全光开关是光通讯、光互连网络、全光计算机芯片等进行快速光信息处理的关键器件。热光、电光、磁光等光开关响应速度慢，是制约快速光交换的瓶颈问题。本项目针对光子晶体、量子点、布拉格光栅等全光开关存在制备工艺复杂、芯片集成难度大、响应速度慢等问题，提出基于芯片上增益-损耗平面级联环形腔PT-symmetry系统的全光开关方案。基于PT-symmetry耦合系统，通过光泵浦实现光的“开、关”控制；建立时域耦合模式理论（TCMT）模型；阐明增益-损耗环形腔间的平衡补偿机制、PT-symmetry效应及PT-symmetry破缺光开关性能与光网络结合机理。建立离子注入、电子束光刻、ICP深硅刻蚀技术制备增益-损耗平面级联环形腔整套MEMS工艺，深入研究PT-symmetry破缺调控及其破缺下全光开关性能、泵浦激光对光开关参数的影响机制，为芯片级全光开关阵列化、集成化奠定研究基础。

The slow response of the optical switching, controlled by thermo, electric, magnetism, is an obstacle of rapid photonic switching. All-optical switching is the most promising way to achieve the rapid optical information processing, such as optical interconnection, optical computing, and optical communication. In previous preparation process for photonic crystal, quantum dot and Bragg grating all optical switching, the procedure is too complex, chip integration is very difficult and response is slow. So in this project, we propose an all-optical-switching based on gain-loss planar cascade ring resonator of parity-time symmetry (PT-symmetry) effect to resolve the problems The "on or off" control on optical is realized using optical pumping under the PT-symmetry broking. On the basis of temporal coupled mode theory (TCMT), the balance compensation between gain-loss ring resonator, PT-symmetry effect, and the performance of all optical switching under PT-symmetry breaking are researched. The ion implantation, electron beam lithography, and ICP deep silicon etching technique are adopted to fabricate the gain-loss planar cascade ring resonator. The PT-symmetry breaking control, the performance of all optical switching under the PT-symmetry breaking and the influence of pump laser on the performance of it are mainly studied. This study laid a foundation for the on-chip array integration by optimizing parameters of all optical switching base on PT-symmetry breaking.