1. Department of Physics; Gomal University; D. I. Khan Pakistan
2. National Centre for Physics, QAU Campus; Islamabad Pakistan
3. Department of Physics, Islamia College Peshawar (Public Sector University); Peshawar Pakistan
4. Department of Applied Physical and Material Sciences; University of Swat; Swat Pakistan
5. Applied Physics Department; Federal Urdu University of Arts, Science and Technology; Islamabad Pakistan