1 Department of Physics, National Institute of Technology Warangal, Warangal, 506004, Telangana, India.
2 Department of Physics, National Institute of Technology Warangal, Warangal, 506004, Telangana, India. Electronic address: syamprasad@nitw.ac.in.
3 Department of Physics, The University of the West Indies, Mona Campus, Jamaica.
4 Joint glass centre of the IIC SAS, TnUAD and FChFT, Funglass, Alexander Dubček University of Trenčín, Trenčín, Slovakia.
5 Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, Guntur, AP, 522510, India.
6 Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Center for Dental and Oral Medicine, Dental Materials Unit, University of Zurich, Zurich, Switzerland.