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

Liu Menghan¹, Chen Peng^{1, †}, Xie Zili¹, Xiu Xiangqian¹, Chen Dunjun¹, Liu Bin¹, Han Ping¹, Shi Yi¹, Zhang Rong^{1, ‡}, Zheng Youdou¹, Cheng Kai², Zhang Liyang²

Photoluminescence spectra of the microdisks with the diameters of (a) 3.3 μm, (c) 8 μm and (e) 18 μm with the increase of pump power at room temperature. Integrated PL intensity versus pump power for (b) 3.3 μm microdisk, (d) 8 μm microdisk and (f) 18 μm microdisk.