College of Physics Qingdao University Qingdao 266071 China;
State Key Laboratory of ASIC & System Department of Microelectronics Fudan University Shanghai 200433 China;
State Key Laboratory Cultivation Base of New Fiber Materials & Modern Textile Qingdao University Qingdao 266071 China;
Key Laboratory of Photonics Materials and Technology in Universities of Shandong(Qingdao University) Qingdao 266071 China;
Institute of Physics Chinese Academy of Sciences Beijing 100190 China;