1. Department of Physics , University of the Punjab , Lahore , Pakistan
2. Department of Chemistry , University of Punjab , Lahore , Pakistan
3. Department of Chemistry , The Islamia University of Bahawalpur , Bahawalpur , Pakistan
4. Department of Electrical Engineering , The University of Lahore , Lahore , Pakistan
5. National Institute of Laser and Optronics (NILOP) , Islamabad , Pakistan
6. Department of Physics , Government College University Faisalabad , Lahore , Pakistan
7. Department of Chemistry , The University of Lahore , Lahore , Pakistan