Shape-dependence of near-field heat transfer between a spheroidal nanoparticle and a flat surface

Abstract

We study the radiative heat transfer between a spheroidal metallic nanoparticle and a planar metallic sample for near- and far-field distances. In particular, we investigate the shape dependence of the heat transfer in the near-field regime. In comparison with spherical particles, the heat transfer typically varies by factors between 1/2 and 2 when the particle is deformed such that its volume is kept constant. These estimates help to quantify the deviation of the actual heat transfer recorded by a near-field scanning thermal microscope from the value provided by a dipole model which assumes a perfectly spherical sensor.

References in corpus (10)

• Near-field heat transfer in a scanning thermal microscope
• Radiative heat transfer between nanostructures
• Near-field radiative heat transfer between a sphere and a substrate
• Effects of spatial dispersion in near-field radiative heat transfer between two parallel metallic surfaces
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• Radiative heat transfer between metallic nanoparticles
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• Limitations of the kinetic theory to describe the near-field heat exchanges in many-body systems
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• Dipole model for far-field thermal emission of a nanoparticle above a planar substrate
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• Electromagnetic field quantization in the presence of a rotating body