Electric and Magnetic response in dielectric dark states for low loss   subwavelength optical meta atoms
  Created surfaces or meta surfaces, composed of appropriately shaped sub-wavelength structures, namely, meta-atoms, control light at wavelength scales. Historically, meta surfaces have used radiating metallic resonators as wavelength inclusions. However, while resonant optical meta surfaces made from metal have been sub-wavelength in the propagation direction, they are too loss for many applications. 
A. Jain, P. Moitra, Th. Koschny, J. Valentine and C. M. Soukoulis
cond-mat.mtrl-sci cond-mat.mes-hall