Mode Control of Quasi-PT Symmetry in Laterally Multi-Mode Double Ridge Semiconductor Laser  

作　　者：Ting Fu Yu-Fei Wang Xue-You Wang Xu-Yan Zhou Wan-Hua Zheng 傅廷;王宇飞;王学友;周旭彦;郑婉华(Laboratory of Solid State Optoelectronics Information technology,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083;College of Future Technology,University of Chinese Academy of Sciences,Beijing 101408;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049;State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083)

机构地区：[1]Laboratory of Solid State Optoelectronics Information technology,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083 [2]College of Future Technology,University of Chinese Academy of Sciences,Beijing 101408 [3]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049 [4]State Key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083

出　　处：《Chinese Physics Letters》2020年第4期67-70,共4页中国物理快报（英文版）

基　　金：Supported by the National Key R&D Program of China(Grant Nos.2016YFB0401804 and 2016YFA0301102);the National Natural Science Foundation of China(Grant Nos.91850206,61535013,and 11981260014).

摘　　要：In traditional semiconductor lasers, it is usual to obtain single lateral mode operation by narrowing the ridge of waveguide, which is sensitive to fabrication inaccuracies. To overcome this shortcoming, a quasi-PT(parity-time)symmetric double ridge semiconductor laser is proposed to reach single lateral mode operation for an intrinsic multi-mode stripe laser. The coupled mode theory is used to analyze the non-Hermitian modulation of the gain(or loss) of the PT symmetric double ridge laser to obtain the coupling coefficient between the two ridge waveguides. Finally, the mode field distributions of the quasi-PT symmetric double ridge laser are simulated before and after the spontaneous PT symmetry breaking, which keep the laser operating in single lateral mode.

关 键 词：WAVEGUIDE MODE DOUBLE 

分 类 号：TN248.4[电子电信—物理电子学]