1. Department of Physics
2. Yogi Vemana University
3. Kadapa-516 003
4. India
5. Advanced Optical Lens Research Center
6. Korea Photonics Technology Institute
7. Cheomdanvenchure-ro 108-9
8. Buk-gu
9. South Korea
10. Sri Venkateswara University
11. Tirupati-517 502
12. Departmento de Física
13. IUdEA, and MALTA Consolider Team
14. Universidad de La Laguna. Apdo. 456. E-38200 San Cristóbal de La Laguna
15. Santa Cruz de Tenerife
16. Spain