Tuning near-infrared emission in metasurfaces with multi-functionalities

We have shown, by numerical simulations, that the spectral position and width of the absorbance in multiple-functionalities metasurfaces can be tuned by modifying the geometry and material parameters of the constitutive layers. Since the absorbance equals the emissivity of these metasurfaces that induce a controllable phase difference between reflected cross-circularly polarized field, they can act as thermal emitters and metalenses.