Design of a novel negative refractive index material based on numerical simulation Muhammad Rizwan, Yan-Kun Dou, Hai-Bo Jin, Zhi-Ling Hou, Ling-Bao Kong, Jing-Bo Li, Faheem K. Butt and Fida Rehman Eur. Phys. J. Appl. Phys., 63 1 (2013) 10502 Published online: 26 July 2013 DOI: 10.1051/epjap/2013130023