Metamaterial Coatings for Broadband Asymmetric Mirrors

Abstract

We report on design and fabrication of nano-composite metal-dielectric thin film coatings with high reflectance asymmetries. Applying basic dispersion engineering principles to model a broadband and large reflectance asymmetry, we obtain a model dielectric function for the metamaterial film, closely resembling the effective permittivity of disordered metal-dielectric nano-composites. Coatings realized using disordered nanocrystalline silver films deposited on glass substrates confirm the theoretical predictions, exhibiting symmetric transmittance, large reflectance asymmetries and a unique flat reflectance asymmetry.

4 pages, 4 figures, submitted to Optics Letters

References in corpus (2)

• Optical Hyperlens: Far-field imaging beyond the diffraction limit
• Plasmonic bandgaps and Trapped Plasmons on Nanostructured Metal Surfaces