1. State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences 1 , 200083 Shanghai, China
2. Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University 2 , 200062 Shanghai, China
3. Key Laboratory of Infrared Imaging Material and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences 3 , 200083 Shanghai, China