Transparent near-infrared reflector metasurface with randomly dispersed silver nanodisks.

We present large-area ultrathin metasurfaces that transmit visible light and reflect near-infrared (NIR) wavelengths. These visible-transparent metasurfaces consist of 10 nm-thick monolayer of randomly dispersed silver nanodisks, that is only λ/90 thickness at the reflection peak wavelength. Calculated optical properties of the structure show that the reflectance for NIR wavelengths increases monotonically as a function of increasing nanodisk density, while the absorption saturates and scattering of visible light decreases. We demonstrate that the proposed structure is easy to fabricate with chemically synthesized silver particles using the bottom-up method and has industrially applications.