1. University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University; New Delhi 110078 India
2. Department of Physics; Aggarwal College; Ballabgarh 121004 Faridabad India
3. Department of Physics; MNIT; Jaipur 302017 India
4. UGC-DAE Consortium for Scientific Research; III/LB-8, Bidhannagar Kolkata 700098 India