1. Division of Computer Engineering, The University of Aizu, Fukushima 965-8580, Japan
2. School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
3. Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
4. Institute of Quantum Materials and Physics, Henan Academy of Sciences, Zhengzhou 450046, China