Heat transfer between anisotropic nanopartricles: Enhancement and switching

Abstract

We theoretically study heat transfer between two anisotropic nanoparticles in vacuum, and derive closed expressions in terms of the anisotropic dipole polarizabilities. We show that transfer between two small spheroids can be many times as large as the one for two spheres of same volumes. Such increase with anisotropy is also found for the heat emission of an isolated small spheroid. Furthermore, we observe a strong dependence of transfer on the relative orientation, yielding the interpretation as a heat transfer switch. The switch quality, given as the ratio of transfer in the ``on'' and ``off'' positions, is observed to be as large as $10^3$ in the near field and even larger in the far field.

References in corpus (7)

• Radiative heat transfer between nanostructures
• Fluctuational-electrodynamic theory and dynamics of heat transfer in multiple dipolar systems
• Casimir Forces between Compact Objects: I. The Scalar Case
• Fluctuating surface-current formulation of radiative heat transfer for arbitrary geometries
• Radiative heat transfer between metallic nanoparticles
• A Green's function formalism of energy and momentum transfer in fluctuational electrodynamics
• Proximity Effects in Radiative Transfer

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