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 simula...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.展开更多
基金National Key R&D Program of China under Grant Nos.2016YFB0400102 and 2016YFB0400602National Natural Science Foundation of China under Grant Nos.61674076,61422401,and 51461135002+3 种基金Collaborative Innovation Center of Solid State Lighting and Energy-saving Electronics,Open Fund of the State Key Laboratory on Integrated Optoelectronics under Grant No.IOSKL2017KF03Natural Science Foundation for Young Scientists of Jiangsu Province under Grant No.BK20160376Research Funds from NJU-Yangzhou Institute of Opto-electronics,and the ResearchDevelopment Funds from State Grid Shandong Electric Power Company and Electric Power Research Institute。
文摘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.
