1. Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials Physics Ministry of Education, and School of Physics and Microelectronics Zhengzhou University Zhengzhou 450052 China
2. State Key Laboratory of Advanced Optical Communication Systems and Networks University of Michigan–Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University Shanghai 200240 China
3. Henan Key Laboratory of Infrared Materials and Spectrum Measures and Applications College of Physics and Materials Science Henan Normal University Xinxiang 453007 China