1. Department of Applied Sciences (Physics Group), Chandigarh University, Mohali, India
2. Post Graduate Department of Physics, DAV College Amritsar, Amritsar, India
3. Department of Physics, Khalsa College Amritsar, Amritsar, India
4. Department of Physics, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, India
5. Department of Physics, Guru Nanak Dev University, Amritsar, India