1. Institute of Laser and Opto-Electronics
2. College of Precision Instruments and Opto-Electronics Engineering
3. Tianjin University
4. Tianjin 300072
5. China
6. College of Mechanical and Electronic Engineering
7. Shandong University of Science and Technology
8. Qingdao
9. Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology
10. School of Science
11. Center of Material Science
12. National University of Defense Technology
13. Changsha 410073