The Research On All-optical Switching Based On Electromagnetically Induced Transparency Effect Of Photonic Crystal Microcavity

In today's background of the rapid development of large data technology, vast amounts of information need to send and receive every day, the performance and reliability of the transmission network is crucial. The development trend of the transmission network is to build all-optical network, then we should develop all-optical switch technology, optical communication is the foundation for all-optical network, and devices of all-optical switch as part of the node, to a certa in extent, affect the light performance of the communication devices, we face some technical problems including improve stability and repeatability, reduce volume for easy integration. The active materials based on the nonlinear effect can cause a significant change in optical properties, as a kind of periodic refractive index variation and artificial optical material, the photonic crystal can easy to fabricate, and PhC can adjust the light transmission, so we propose to use optical nonlinear effects to achieve all-optical switch in active photonic crystal microcavities.In this paper, we study All-optical switch based on electromagnetically induced transparency(EIT) effect of active photonic crystal microcavity, we first study the theoretical models for semiconductor MQWs. From semi-classical theory, we study the interaction of light with matter, analysize the impact of various parameters on the EIT effect, and achieve to enhance the efficiency of the switch in theory by adjusting the optimal parameters. We proceed the simulations of our structure through the 3D-FDTD simulation, optimize the structure of the relevant parameters and achieve reduction of absorption loss, insertion loss, and transmission loss. Meanwhile, All-optical switch based on analogy to EIT of PhC is designed and simulated. In order to realize all-optical switch, while the upper and lower arms splitting ratio satisfies a certain relationship. We optimize some parameters of structure through simulation, light transmission paths are designed and simulated, and draw layout using related software and carry out experiments.