1. College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, Qingdao 266071, China
2. National Demonstration Center for Experimental Applied Physics Education (Qingdao University), Qingdao 266071, China
3. Weihai Innovation Research Institute of Qingdao University, Weihai 264200, China
4. CRYSTECH Inc., Qingdao, 266107, China