1. Department of Physics
2. Hazara University
3. Mansehra 21300
4. Pakistan
5. The Guo China-US Photonics Laboratory
6. Changchun Institute of Optics
7. Fine Mechanics and Physics Chinese Academy of Sciences
8. Changchun 130033
9. P. R. China
10. University of Malakand
11. Chakdara
12. School of Molecular Sciences
13. The University of Western Australia
14. Perth
15. Australia
16. Institute of Research and Development
17. Duy Tan University
18. Vietnam
19. Abbottabad University of Science and Technology
20. Abbottabad 22010