[1] Natl Key Lab Integrated Circuits & Microsyst, Chongqing 400060, Peoples R China
[2] Sichuan Inst Solid State Circuits, Chongqing 400060, Peoples R China
[3] Univ Elect Sci & Technol China, Sch Integrated Circuit Sci & Engn, Chengdu 610054, Peoples R China
[4] Chongqing Semichip Elect Co Ltd, Chongqing 401332, Peoples R China
[5] Chongqing Univ Posts & Telecommun, Sch Optoelect Engn, Chongqing 400065, Peoples R China
[6] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[7] China Acad Space Technol, Beijing 100094, Peoples R China
[8] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China