[1] Hunan Univ, Key Lab Micro Nano Optoelect Devices, Minist Educ, Changsha 410082, Peoples R China
[2] Hunan Univ, Sch Phys & Elect, Hunan Prov Key Lab Lowdimens Struct Phys & Device, Changsha 410082, Peoples R China
[3] Shanghai Inst Space Power Sources, Shanghai 201100, Peoples R China
[4] Tsinghua Univ, Ctr High Reliabil Power Semicond, Yangtze Delta Reg Inst, Hangzhou 314000, Zhejiang, Peoples R China
[5] Aurorachip Co Ltd, Hangzhou 314000, Zhejiang, Peoples R China
[6] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China