1. School of Material and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
2. Shangyu Institute of Science and Engineering, Hangzhou Dianzi University, Shaoxing 312000, China
3. The College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China
4. Department of Physics, Xiamen University, Xiamen 361005, China