1. Institute of Nano-Optoelectronics Research and Technology (iNOR), USM, Penang, Malaysia
2. Gifted Students School in Anbar, Gifted Guardianship Committee, Ministry of Education, Baghdad, Iraq
3. School of Physics, Universiti Sains Malaysia, Penang, Malaysia
4. Department of Physics, College of Science, University of Anbar, Ramadi, Iraq