1. Department of Applied Optics & Photonics, University of Calcutta, JD-2, Sector-III, Salt Lake, Kolkata, West Bengal 700 106, India
2. Center for Astroparticle Physics and Space Science, Bose Institute, Salt Lake, College More, EN Block, Sector V, Kolkata, West Bengal 700091, India
3. Department of Physics, Ananda Mohan College, 102/1, Raja Rammohan Roy Sarani, Kolkata, West Bengal 700 009, India
4. School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S C Mullick Road, Kolkata, West Bengal 700032, India
5. Department of Chemistry, West Bengal State University, Barasat, Kolkata, West Bengal 700126, India