PT-symmetric optical systems have been widely researched in recent years and most of the researches are limited to weakly guiding condition. In this paper, we propose a method based on the conventional coupled mode theory (CMT) to describe PT-symmetric coupling systems regardless of the guiding conditions. With this method, we can examine the unique PT characteristics and design various PT optical structures.
© 2013 IEEE
Yubo Li, Xianxin Guo, Li Chen, Chao Xu, Jianyi Yang, Xiaoqing Jiang, and Minghua Wang, "Coupled Mode Theory Under The Parity-Time Symmetry Frame," J. Lightwave Technol. 31, 2477-2481 (2013)