title: Low-loss single-layer metamaterial with negative index of refraction at visible wavelengths.
abstract: We present a structure exhibiting a negative index of refraction at visible or near infrared frequencies using a single metal layer. This contrasts with recently developed structures based on metal-dielectric-metal composites. The proposed metamaterial consists of periodically arranged thick stripes interacting with each other to give rise to a negative permeability. Improved designs that allow for a negative index for both polarizations are also presented. The structures are numerically analyzed and it is shown that the dimensions can be engineered to shift the negative index band within a region ranging from telecommunication wavelengths down to blue light.
authors: C
authors: C
authors: García-Meca
authors: R
authors: R
authors: Ortuño
authors: R
authors: R
authors: Salvador
authors: A
authors: A
authors: Martínez
authors: J
authors: J
authors: Martí