1. Materials and Nano Engineering Research Lab, Department of Physics, Department of Chemistry, DIT University, Dehradun 248009, Uttarakhand, India
2. Department of Electrical and Electronics & Communication Engineering, DIT University, Dehradun 248009, Uttarakhand, India
3. Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng-252059, Shandong China