1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
2. National Institute of Lasers and Optronics College, Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad 45650, Pakistan
3. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, P. R. China
4. Department of Physics, Abdul Wali Khan University, Mardan 23200, KPK, Pakistan