Approach to Single-Mode Dominated Resonant Emission in GaN-Based Square Microdisks on Si
Meng-Han Liu1, Peng Chen1**, Zi-Li Xie1, Xiang-Qian Xiu1, Dun-Jun Chen1, Bin Liu1, Ping Han1, Yi Shi1, Rong Zhang1**, You-Dou Zheng1, Kai Cheng2, Li-Yang Zhang2
1Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and School of Electronic Science and Engineering, Nanjing University, Nanjing 210093 2Enkris Semiconductor Inc. NW-20, Nanopolis Suzhou, Suzhou 215123
Abstract：Square microdisks with round corners are fabricated using a standard GaN-based blue LED on Si substrates. Whispering gallery-like modes 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 confocal micro-photoluminescence 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 1.5 μm.
Selles J, Crepel V, Roland I, El Kurdi M, Checoury X, Boucaud P, Mexis M, Leroux M, Damilano B, Rennesson S, Semond F, Gayral B, Brimont C and Guillet T 2016 Appl. Phys. Lett.109 231101
Xie W Q, Stöferle T, Rainò G, Aubert T, Bisschop S, Zhu Y P, Mahrt R F, Geiregat P, Brainis E, Hens Z and Van Thourhout D 2017 Adv. Mater.29 1604866
[14]
Qualtieri A, Morello G, Spinicelli P, Todaro M T, Stomeo T, Martiradonna L, De Giorgi M, Quelin X, Buil S, Bramati A, Hermier J P, Cingolani R and De Vittorio M 2009 New J. Phys.11 033025
2020, Vol. 37 
