Lasing characteristics of GaN-based whispering gallery mode optical microcavityAuthor/作者：Feng Yun（云峰）, Peng Hu（胡朋）,Yufeng Li（李虞鋒）, Qiang Li（李強）,Ye Zhang(張燁)Institute：Shaanxi Provincial Key Laboratory of PhotonicsInformation Technology, Xian Jiaotong University