1. Research Scholar, Register Number: 20213112132017, Manonmanium Sundaranar University, Tirunelveli, Tamil Nadu, India
2. Department of Physics and Research Centre, Nesamony Memorial Christian College, Marthandam, Tamilnadu, India
3. Department of Physics, University of Kerala, Thiruvananthapuram, Kerala, India
4. Department of Chemistry, NSS College, Ottapalam, Kerala, India