1. Photophysics Laboratory, Department of Physics, DSB Campus Kumaun University Nainital India
2. Department of Chemistry and Biomolecular Sciences University of Ottawa Ottawa Ontario Canada
3. Laser Diagnostics Division Institute for Plasma Research Gandhinagar India
4. Laser Spectroscopy Laboratory, Department of Applied Physics Delhi Technical University Delhi India
5. Department of Physics, Mahila Maha Vidhyalaya Banaras Hindu University Varanasi India