1. Universiti Teknologi Malaysia, Laser Centre, Ibnu-Sina Institute for Scientific and Industrial Research, Johor Bahru 81310, Malaysia
2. University of the Punjab, Centre of Excellence in Solid State Physics, QAC, Lahore 54590, Pakistan
3. Universiti Teknologi Malaysia, Chemistry Department, Faculty of Science, Johor Bahru 81310, Malaysia
4. Comsats Institution of Information Technology, Lahore, Pakistan