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Chin. Phys. B, 2020, Vol. 29(8): 084203    DOI: 10.1088/1674-1056/ab9443

High-efficiency photon-electron coupling resonant emission in GaN-based microdisks on Si

Menghan Liu(刘梦涵)1, Peng Chen(陈鹏)1, Zili Xie(谢自力)1, Xiangqian Xiu(修向前)1, Dunjun Chen(陈敦军)1, Bin Liu(刘斌)1, Ping Han(韩平)1, Yi Shi(施毅)1, Rong Zhang(张荣)1, Youdou Zheng(郑有炓)1, Kai Cheng(程凯)2, Liyang Zhang(张丽阳)2
1 Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and School of Electronic Science and Engineering, Nanjing University, Nanjing 210093, China;
2 Enkris Semiconductor Inc. NW-20, Nanopolis Suzhou, 99 Jinji Avenue 215123, China
Abstract  Resonance effects caused by the photon-electron interaction are a focus of attention in semiconductor optoelectronics, as they are able to increase the efficiency of emission. GaN-on-silicon microdisks can provide a perfect cavity structure for such resonance to occur. Here we report GaN-based microdisks with different diameters, based on a standard blue LED wafer on a Si substrate. A confocal photoluminescence spectroscopy is performed to analyze the properties of all microdisks. Then, we systematically study the effects of radial modes and axial modes of these microdisks on photon-electron coupling efficiency by using three-dimensional finite-difference time-domain simulations. For thick microdisks, photon-electron coupling efficiency is found to greatly depend on the distributions of both the radial modes and the axial modes, and the inclined sidewalls make significant influences on the axial mode distributions. These results are important for realization of high-efficiency resonant emission in GaN-based microcavity devices.
Keywords:  microdisks      photon-electron coupling      whispering gallery mode      axial mode  
Received:  29 January 2020      Revised:  13 April 2020      Accepted manuscript online: 
PACS:  42.55.Sa (Microcavity and microdisk lasers)  
  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  
Fund: Project supported by the National Key R&D Program of China (Grant Nos. 2016YFB0400102 and 2016YFB0400602), the National Natural Science Foundation of China (Grant Nos. 61674076, 61422401 and 51461135002), the Collaborative Innovation Center of Solid State Lighting and Energy-Saving Electronics, Open Fund of the State Key Laboratory on Integrated Optoelectronics (Grant No. IOSKL2017KF03), the Natural Science Foundation for Young Scientists of Jiangsu Province of China (Grant No. BK20160376), the Research Funds from NJU-Yangzhou Institute of Opto-electronics, and the Research and Development Funds from State Grid Shandong Electric Power Company and Electric Power Research Institute.
Corresponding Authors:  Peng Chen, Peng Chen     E-mail:;

Cite this article: 

Menghan Liu(刘梦涵), Peng Chen(陈鹏), Zili Xie(谢自力), Xiangqian Xiu(修向前), Dunjun Chen(陈敦军), Bin Liu(刘斌), Ping Han(韩平), Yi Shi(施毅), Rong Zhang(张荣), Youdou Zheng(郑有炓), Kai Cheng(程凯), Liyang Zhang(张丽阳) High-efficiency photon-electron coupling resonant emission in GaN-based microdisks on Si 2020 Chin. Phys. B 29 084203

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