1. Shenzhen Key Laboratory of Laser Engineering
2. College of Optoelectronic Engineering
3. Shenzhen University
4. Shenzhen
5. 518060
6. College of Physics and Optoelectronics
7. Taiyuan University of Technology
8. Taiyuan 030024
9. P. R. China
10. State Key Laboratory of Silicon Materials
11. School of Materials Science and Engineering
12. Zhejiang University
13. Hangzhou 310027