1. College of Materials Science and Engineering Key Laboratory of Advanced Materials of Yunnan Province Kunming University of Science and Technology Kunming Yunnan 650093 China
2. School of Physics and Opto‐Electronic Technology Baoji University of Arts and Sciences Baoji Shaanxi 721016 China
3. State Key Laboratory of Modern Optical Instrumentation College of Optical Science and Engineering International Research Center for Advanced Photonics Zhejiang University Hangzhou Zhejiang 310058 China
4. Department of Applied Physics The Hong Kong Polytechnic University No. 11 Yu Cai Rd. Kowloon 999077 Hong Kong