Goos-Hanchen shifts of Gaussian beams reflected from surfaces coated with cross-anisotropic metasurfaces

The Goos-Hanchen (GH) shift of a Gaussian beam reflected from surfaces coated with a cross-anisotropic metasurface (CM) is theoretically investigated. It is revealed that, the CM coating has influence on the spatial GH shift as well as the angular one, only at the total internal reflection condition, where the incident angle theta is above critical angle theta(c). Moreover, near theta(c), a positive or negative larger peak spatial GH shift occurs while a pair of positive and negative peaks angular GH shifts appear, compared to the case of no coating, which are induced by the CM coating. Therefore, our results may provide a feasible method to obtain a larger GH shift, and open new possibilities for applications of the CMs.

Automated summary

It is theoretically investigated the influence of a cross-anisotropic metasurface (CM) coating on the Goos-Hanchen (GH) shift of a Gaussian beam reflected from surfaces, particularly at the total internal reflection condition near critical angle theta(c). The results show that the CM coating can induce larger peak spatial GH shift and a pair of positive and negative peaks angular GH shifts, providing new possibilities for applications of the CMs.