1. Department of Physics
2. Banaras Hindu University
3. Varanasi-221005
4. India
5. Institute of Physical Chemistry
6. Department of Chemistry
7. Leibniz Institute of Photonic Technology
8. 07745 Jena
9. Germany
10. Abbe Center of Photonics
11. Friedrich-Schiller University
12. 07743 Jena