Metasurface-mediated anisotropic radiative heat transfer between nanoparticles

Abstract

Metasurfaces, the two-dimensional (2D) counterpart of metamaterials, have recently attracted a great attention due to their amazing properties such as negative refraction, hyperbolic dispersion, manipulation of the evanescent spectrum. In this work, we propose a theory model for the near field radiative heat transfer (NFRHT) between two nanoparticles in the presence of an anisotropic metasurface. Specifically, we set the metasurface as an array of graphene strips (GS) since it is an ideal platform to implement any metasurface topology, ranging from isotropic to hyperbolic propagation. We show that the NFRHT between two nanoparticles can not only be significantly amplified when they are placed in proximity of the GS, but also be regulated over several orders of magnitude. In this configuration, the anisotropic surface plasmon polaritons (SPPs) supported by the GS are excited and provide a new channel for the near-field energy transport. We analyze how the conductance between two nanoparticles depends on the orientation, the structure parameters and the chemical potential of the GS, on the particle-surface or the particle-surface distances by clearly identifying the characteristics of the anisotropic SPPs such as dispersion relations, propagation length and decay length. Our findings provide a powerful way to regulate the energy transport in the particle systems, meanwhile in turn, open up a way to explore the anisotropic optical properties of the metasurface based on the measured heat transfer properties.

17 pages, 8figures, Journal

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• Radiative thermal switch exploiting hyperbolic surface phonon polaritons
• Radiative heat transfer and radiative thermal energy for 2D nanoparticle ensembles
• High-rectification near-field radiative thermal diode using Weyl semimetals
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• Topological near-field heat flow in a honeycomb lattice
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• Magnetoplasmon-surface phonon polaritons coupling effects in radiative heat transfer
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• Hybrid Thermal Yagi-Uda Nanoantennas for Directional and Narrow Band Long-wavelength IR Radiation Sources
• Effect of graphene grating coating on near-field radiative heat transfer
• Many-body interaction on near-field radiative heat transfer between two nanoparticles caused by proximate particle ensembles
• Heat radiation and transfer for nanoparticles in the presence of a cylinder
• Favorable and unfavorable many-body interactions for near-field radiative heat transfer in nanoparticle networks
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• Time-dependent radiative heat flux after the beginning of thermal radiation
• Generalized coupled dipole method for thermal far-field radiation
• Near-field focusing and amplification of tip-substrate radiative heat transfer
• Radiative heat transfer with a cylindrical waveguide decays logarithmically slow