TY - JOUR T1 - Experimental realization of an epsilon-near-zero metamaterial at visible wavelengths JF - Nature Photonics Y1 - 2013 A1 - Maas, Ruben A1 - Parsons, James A1 - Engheta, Nader A1 - Polman, Albert VL - 7 UR - http://www.nature.com/doifinder/10.1038/nphoton.2013.256 IS - 11 JO - Nature Photon ER -