1. School of Optical and Electronic Information
2. Wuhan National Laboratory for Optoelectronics
3. Huazhong University of Science and Technology
4. Wuhan 430074
5. P. R. China
6. Department of Physics
7. College of Science
8. Shihezi University
9. Xinjiang
10. PR China
11. Institute of Applied Physics and Materials Engineering
12. Department of Physics and Chemistry
13. Faculty of Science and Technology
14. University of Macau
15. Macao SAR