1. Plasmonics and Perovskites Laboratory Indian Institute of Technology Kanpur Kanpur 208016 UP India
2. Department of Ceramic Engineering Indian Institute of Technology (BHU) Varanasi 221005 UP India
3. Department of Materials Science and Engineering Indian Institute of Technology Kanpur Kanpur 208016 UP India
4. Zavoisky Physical-Technical Institute FRC Kazan Scientific Center of RAS Sibirsky tract, 10/7 Kazan 420029 Russia
5. Physics Department Ewing Christian College Allahabad 211003 UP India