1. University of Edinburgh, School of Mathematics and Maxwell Institute for Mathematical Sciences, Edinburgh EH9 3FD, Scotland, United KingdombPennsylvania State University, Department of Engineering Science and Mechanics, NanoMM—Nanoengineered Metamaterials
2. Lahore University of Management Sciences, Department of Physics, Lahore 54792, Pakistan
3. Pennsylvania State University, Department of Engineering Science and Mechanics, NanoMM—Nanoengineered Metamaterials Group, 212 EES Building, University Park, Pennsylvania 16802, United States
4. Clemson University, Holcombe Department of Electrical and Computer Engineering, Clemson, South Carolina 29634, United States