1. Department of Applied Sciences; Chitkara University; Rajpura Panjab India
2. Department of Physical Sciences; IKG Punjab Technical University; Kapurthala Panjab India
3. Department of Physics; Panjab University Chandigarh; Chandigarh Panjab India
4. Department of Physics; GGDSD College; Chandigarh Panjab India