1. Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Science (PIEAS) 1 , Islamabad 45650, Pakistan
2. Physics Division, Pakistan Institute of Nuclear Science and Technology 2 , Nilore, Islamabad 45650, Pakistan
3. Department of Metallurgy and Materials Engineering, Pakistan Institute of Engineering and Applied Science (PIEAS) 3 , Islamabad 45650, Pakistan
4. Laser-Matter Interaction Laboratory, Department of Physics, COMSATS University Islamabad 4 , Park Road, 45550 Islamabad, Pakistan