1. Department of Physics, Wenzhou University, Wenzhou, Zhejiang 325035, China
2. Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
3. Oujiang Laboratory, Wenzhou, Zhejiang 325000, China
4. Department of Physics, Graduate School of Science, Chiba University, Chiba 263-8522, Japan
5. Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan