1. Research Center for Applied Science and Technology, Tribhuvan University, Kathmandu, Nepal
2. Department of Physics, Tri-Chandra Multiple Campus, Ghantaghar, Kathmandu, Nepal
3. Department of Physics, College of Natural Science, Arba Minch University, Arba Minch, Ethiopia
4. Department of Engineering Physics, AUCE (A), Andhra Pradesh, Visakhapatnam, India
5. Department of Physics, AUCST, Andhra Pradesh, Visakhapatnam, India