1. Department of Physics; COMSATS Institute of Information Technology; Lahore 54000 Pakistan
2. Department of Electrical and Electronic Engineering; Universiti Teknologi PETRONAS; Bandar Seri Iskandar Tronoh 31750 Perak Malaysia
3. Department of Fundamental and Applied Sciences Engineering; Universiti Teknologi PETRONAS; Bandar Seri Iskandar Tronoh 31750 Perak Malaysia
4. Department of Physics; University of Canterbury; Christchurch 8140 NewZealand
5. Department of Physics; Bahauddin Zakariya University; Multan 60800 Pakistan
6. Department of Physics; The Islamia University of Bahawalpur; Bahawalpur 63100 Pakistan