Affiliation: | 1. Department of Physics, Sikkim University, 6th Mile Samdur, East Sikkim, 737102, India;2. Department of Chemistry, Sikkim University, 6th Mile Samdur, East Sikkim, 737102, India;1. Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA;2. Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, MD 20899, USA |