1. Department of Physics, Govt. Pt. Shyamacharan Shukla College Dharsiwa, Raipur, India
2. Nanophotonics Laboratory, Department of Physics, C.V. Raman College of Engineering, Bhubaneswar, India
3. Department of Physics, National Institute of Technology, Raipur, India
4. School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University, Raipur, India