Approach to Single-Mode Dominated Resonant Emission in Ga N-Based Square Microdisks on Si  

作　　者：Meng-Han Liu Peng Chen Zi-Li Xie Xiang-Qian Xiu Dun-Jun Chen Bin Liu Ping Han Yi Shi Rong Zhang You-Dou Zheng Kai Cheng Li-Yang Zhang 刘梦涵;陈鹏;谢自力;修向前;陈敦军;刘斌;韩平;施毅;张荣;郑有炓;程凯;张丽阳(Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and School of Electronic Science and Engineering,Nanjing University,Nanjing 210093;Enkris Semiconductor Inc.NW-20,Nanopolis Suzhou,Suzhou 215123)

机构地区：[1]Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and School of Electronic Science and Engineering,Nanjing University,Nanjing 210093 [2]Enkris Semiconductor Inc.NW-20,Nanopolis Suzhou,Suzhou 215123

出　　处：《Chinese Physics Letters》2020年第5期59-63,共5页中国物理快报（英文版）

基　　金：National Key R&D Program of China under Grant Nos.2016YFB0400102 and 2016YFB0400602;National Natural Science Foundation of China under Grant Nos.61674076,61422401,and 51461135002;Collaborative Innovation Center of Solid State Lighting and Energy-saving Electronics,Open Fund of the State Key Laboratory on Integrated Optoelectronics under Grant No.IOSKL2017KF03;Natural Science Foundation for Young Scientists of Jiangsu Province under Grant No.BK20160376;Research Funds from NJU-Yangzhou Institute of Opto-electronics,and the Research;Development Funds from State Grid Shandong Electric Power Company and Electric Power Research Institute。

摘　　要：Square microdisks with round corners are fabricated using a standard GaN-based blue LED on Si substrates.Whispering gallery-like inodes in the square microdisks are investigated by finite-difference time-domain simulation.The simulation results reveal that the round corners in square microdisks can substantially suppress the number of light propagation paths and further reduce the number of optical modes.A con focal microphotoluminescence is performed to analyze the optical properties of the square microdisks at room temperature.The single-mode dominant resonant emission is obtained in the square microdisk with corner radius of 1.5μm.

关 键 词：temperature. optical CORNERS 

分 类 号：TN312.8[电子电信—物理电子学] TN304