1. Centre for Graphene Science; College of Engineering, Mathematics, and Physical Sciences; University of Exeter; Exeter EX4 4QL UK
2. EPSRC Centre for Doctoral Training in Metamaterials (XM2); College of Engineering, Mathematics, and Physical Sciences; University of Exeter; Exeter EX4 4QL UK
3. Department of Physics; College of Science; University of Duhok; Duhok 42001 Kurdistan Region Iraq