Deposited metamaterial thin film with negative refractive index and permeability in the visible regime

Thin films are fabricated from arrays of silver nanorods with thicknesses of 160?nm and 200?nm, to function as a metamaterial. The negative refractive index and negative permeability are retrieved from measured reflection and transmission coefficients using walk-off interferometer in the visible regime. A negative-index-material thin film with negative permittivity or (and) permeability can be produced by glancing angle deposition.