Institution: | 1.Photophysics Laboratory, Department of Physics, Centre of Advanced Study, DSB Campus, Kumaun University, Nainital, 263002, Uttarakhand, India ;2.Laser Spectroscopy Laboratory, Department of Applied Physics, Delhi Technological University, Delhi-110042, India ;3.Physics Department, Lajpat Rai College, Sahibabad, Ghaziabad, 201005, U.P, India ; |