1. School of Information and Control Engineering; Xi'an University of Architecture and Technology; Xi'an 710055 People's Republic of China
2. Xidian University, Xi'an; Xi'an 710071 People's Republic of China
3. School of Microelectronics; Xidian University, Xi'an Xi'an; 710071 People's Republic of China
4. College of Optoelectronics Technology; Chengdu University of Information Technology; Chengdu 610225 People's Republic of China
5. Functional Materials Laboratory (FML) School of Materials & Mineral Resources; Xi'an University of Architecture and Technology; Xi'an 710055 People's Republic of China