A broadband omnidirectional absorber based on a hetero-structure composed of epsilon-negative material and mu-negative materialJian-Dong Liu, Shao-Bin Liu, Xiang-Kun Kong and Yi DaiEur. Phys. J. Appl. Phys., 66 3 (2014) 30102DOI: https://doi.org/10.1051/epjap/2014140009
