[1] Shanghai Key Lab of Modern Optical System, Ministry of Education, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China
[2] Department of Applied Physics, Donghua University, 2999 North Renmin Road, Shanghai 201620, China
[3] Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
[4] State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China