Engineering the heat flux between two surfaces kept at different temperatures relies on the ability to tailor the dispersion of modes sustained by the system. Metasurfaces made of ordered arrays of subwavelength spherical nanoparticles have an optical response that depends not only on materials but also on their geometrical parameters. Our system is modeled by using an effective medium approximation allowing the homogenization of individual metasurfaces and replacing them with anisotropic layers. Excitation or suppression of surface and hyperbolic modes can be controlled by means of different degrees of freedom offered by the metasurfaces. By leveraging this flexibility, we theoretically show that the near-field radiative heat transfer between two such metasurfaces can be effectively geometrically tuned.
Near-field radiative heat transfer management by subwavelength plasmonic crystals
Note: This paper is part of the APL Special Collection on Thermal Radiation at the Nanoscale and Applications.
S. G. Castillo-López, R. Esquivel-Sirvent, C. Villarreal, G. Pirruccio; Near-field radiative heat transfer management by subwavelength plasmonic crystals. Appl. Phys. Lett. 14 November 2022; 121 (20): 201708. https://doi.org/10.1063/5.0123232
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