Near-field heat transfer between a nanoparticle and a rough surface

Abstract

In this work we focus on the surface roughness correction to the near-field radiative heat transfer between a nanoparticle and a material with a rough surface utilizing a direct perturbation theory up to second order in the surface profile. We discuss the different distance regimes for the local density of states above the rough material and the heat flux analytically and numerically. We show that the heat transfer rate is larger than that corresponding to a flat surface at short distances. At larger distances it can become smaller due to surface polariton scattering by the rough surface. For distances much smaller than the correlation length of the surface profile, we show that the results converge to a proximity approximation, whereas in the opposite limit the rough surface can be replaced by an equivalent surface layer.

References in corpus (5)

• Near-field radiative heat transfer between a sphere and a substrate
• The Casimir force between rough metallic plates
• Roughness correction to the Casimir force : Beyond the Proximity Force Approximation
• Near-field thermal imaging of nanostructured surfaces
• Near-field induction heating of metallic nanoparticles due to infrared magnetic dipole contribution

Cited by in corpus (16)

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• Integrated near-field thermo-photovoltaics for on-demand heat recycling
• Exact microscopic theory of electromagnetic heat transfer between a dielectric sphere and plate
• The Thermal Discrete Dipole Approximation (T-DDA) for near-field radiative heat transfer simulations in three-dimensional arbitrary geometries
• On Super-Planckian thermal emission in far field regime
• Influence of roughness on near-field heat transfer between two plates
• Radiative cooling of nanoparticles close to a surface
• Shape-dependence of near-field heat transfer between a spheroidal nanoparticle and a flat surface
• Casimir--Polder force between anisotropic nanoparticles and gently curved surfaces
• Radiative energy and momentum transfer for various spherical shapes: a single sphere, a bubble, a spherical shell and a coated sphere
• Temperature of a nanoparticle above a substrate under radiative heating and cooling
• Statistical properties of spontaneous emission near a rough surface
• Second-order calculation of the local density of states above a nanostructured surface
• Dipole model for far-field thermal emission of a nanoparticle above a planar substrate
• Near-field radiative heat transfer between rough surfaces modeled using effective media with gradient distribution of dielectric function
• Complex orientation dependence of Casimir-Polder interaction induced by curvature and optical properties of the surface and the surrounding medium