Отражение света от слоя гиперболического метаматериала

Abstract

In this paper, we study the features of reflection of a plane elliptically polarized electromagnetic wave falling from an isotropic non-absorbing medium on a layer of hyperbolic metamaterial (HMM) the optical axis of which is parallel to the interface and the diagonal values ​​of the dielectric constant are less than the dielectric constant of an isotropic medium. It is shown that changing the values of the angle of incidence and the angle between the plane of incidence and the optical axis of the HMM one can realize different regimes of refrection: when ordinary ( or extraodinary) wave or both waves decay from the interface. Meanwhile, in the latter case, for some values ​​of the angles the decaying can be nonexponential. For these three cases, numerical calculations of the reflection coefficient from the ITO / Ag nanostructure layer are performed. When the polarization of the incident wave varies, the energetic reflection coefficient changes from minimum to maximum values which depend on the layer thickness. Unlike usual anisotropic media, in all cases the maximum value of the reflection coefficient tends to unity with increasing the layer thickness. When the amplitude of the ordinary or extraordinary wave does not decrease from the interface, the minimum reflection coefficient periodically vanishes with increasing layer thickness due to the interference. In the case when both waves decay, and under some conditions the incidence is not exponential, the minimum reflection coefficient vanishes at a certain layer thickness, and then tends to unity.