Affiliation: | [1]College of Physics Science, Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory,and Key Laboratory of Photonics Materials and Technology in Universities of Shandong, Qingdao University, Qingdao 266071, China; [2]College of Physics and Energy, Fujian Normal University, Fuzhou 350007, China; [3]National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |