Optical functions of fishnet metamaterial embedded in dielectrics

The effective optical constants of fishnet metamaterial are affected by the surrounding dielectric material or layers Analytical formulas were derived to retrieve the effective optical constants of fishnet metamaterial surrounded by different bulk materials, from reflection and transmission coefficients, and the effective optical constants of the fishnet embedded in thin film layers stack were retrieved numerically. With increase of the refractive index of the surrounding dielectric material as well as of the thickness of the nearby dielectric layers, the plasmonic resonance spectral position undergoes redshift while the absolute maximum value of negative refractive index of fishnet decreases.