1. Department of Physics; Yogi Vemana University; Kadapa- 516 003 India
2. School of Information and Communications; Gwangju Institute of Science and Technology; 123 Cheomdan-gwagiro, Buk-gu Gwangju 500-712 South Korea
3. Departamento de Física, MALTA Consolider Team; Instituto Universitario de Materiales y Nanotecnología (IMN); Instituto Universitario de Estudios Avanzados en Física, Atómica, Molecular y Fotónica (IUdEA); Universidad de La Laguna; 38200 San Cristóbal de La Laguna Santa Cruz de Tenerife Spain
4. Department of Physics; Government Degree College; Satyaveedu- 517 588 India
5. Department of Physics; Sri Venkateswara University; Tirupati- 517 502 India