1. College of Physics, Qingdao University, Qingdao266071, China
2. National Demonstration Center for Experiment Applied Physics Education (Qingdao University), Qingdao266071, China
3. College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication Qingdao University, Qingdao266071, China
4. Weihai Innovation Research Institute of Qingdao University, Weihai264200, China