1. Quzhou University
2. Quzhou 324000
3. P. R. China
4. Ningbo Institute of Materials Technology and Engineering
5. Chinese Academy of Sciences
6. Hebei Key Lab of Optic-Electronic Information and Materials
7. College of Physics Science and Technology
8. Hebei University
9. Baoding 071002
10. People's Republic of China
11. Shandong Province Key Laboratory of Medical Physics and Image Processing Technology
12. School of Physics and Electronics
13. Shandong Normal University
14. Jinan 250358
15. China
16. Ningbo