1. Jaypee Institute of Information Technology A‐10, Sector‐62 Noida Uttar Pradesh 201307 India
2. Joint Laboratory of Optics of Palacký University and Institute of Physics of CAS Faculty of Science Palacký University 17. listopadu 12 Olomouc 771 46 Czech Republic
3. Physical Research Laboratory Navrangpura, Ahmedabad Gujarat 380009 India