1. Jiangsu Key Laboratory of Advanced Laser Materials and Devices
2. School of Physics and Electronic Engineering
3. Jiangsu Normal University
4. Xuzhou
5. P. R. China
6. School of Mechanical Engineering
7. Jiangsu University
8. Zhenjiang
9. Department of Physics and Astronomy
10. Bowling Green State University
11. Bowling Green
12. USA
13. School of Materials Science and Engineering
14. Georgia Institute of Technology
15. Atlanta