1. School of Physics, University College Dublin 1 , Belfield, Dublin 4, Ireland
2. King Abdulaziz City for Science and Technology (KACST) 2 , Riyadh 12371, Saudi Arabia
3. Department of Physics, College of Science and Humanities, Shaqra University 3 , Shaqra, Kingdom of Saudi Arabia
4. Conway Institute of Biomolecular and Biomedical Research, University College Dublin 4 , Belfield, Dublin 4, Ireland