Proximity Effects in Radiative Transfer

Details Proximity Effects in Radiative Transfer Proximity Effects in Radiative Transfer

2010-10-05

arxiv.org/abs/1010.0875v1

Physics

Condensed Matter

Other Condensed Matter

5 journal pages, 4 figures

Scientific paper

10.1103/PhysRevB.83.161406

Though the dependence of near-field radiative transfer on the gap between two planar objects is well understood, that between curved objects is still unclear. We show, based on the analysis of the surface polariton mediated radiative transfer between two spheres of equal radii $R$ and minimum gap $d$, that the near--field radiative transfer scales as $R/d$ as $d/R \rightarrow 0$ and as $\ln(R/d)$ for larger values of $d/R$ up to the far--field limit. We propose a modified form of the proximity approximation to predict near--field radiative transfer between curved objects from simulations of radiative transfer between planar surfaces.

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