Cross-Polarization Carpet Cloaking Based on Polarization Conversion Metasurfaces

Abstract

The principle of phase compensation on the metasurfaces is applied to realize the cloaking function, which provides a new idea for the further development of invisibility technology. However, the uppermost layer of the metasurface carpet cloak previously studied is mostly a metal structure with ohmic loss and low coupling efficiency. In practical applications, these ordinary invisibility cloaks are easy to be corroded, and does not endure high temperature, and only has the function of invisibility under the action of the same polarization. Here, we propose to use the unit structure of high-refractive-index dielectric silicon resonators to construct the invisibility cloak, which can better reduce loss, improve reflection efficiency, and can be better applied to practical applications. A unique cross polarization stealth device with the broadband cloaking effect is designed to effectively resist cross polarization detectors. Objects of arbitrary shape can be hidden under the triangular carpet stealth device designed to achieve the purpose that the detector cannot detect, so as to achieve stealth function. The working wavelength of the cloak proposed is at 1550nm, achieving the effect of cross polarization invisibility in the communication band.