Radiative heat transfer between two dielectric nanogratings in the scattering approach

Abstract

We present a theoretical study of radiative heat transfer between dielectric nanogratings in the scattering approach. As a comparision with these exact results, we also evaluate the domain of validity of Derjaguin's Proximity Approximation (PA). We consider a system of two corrugated silica plates with various grating geometries, separation distances, and lateral displacement of the plates with respect to one another. Numerical computations show that while the PA is a good approximation for aligned gratings, it cannot be used when the gratings are laterally displaced. We illustrate this by a thermal modulator device for nanosystems based on such a displacement.

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• Casimir interaction of dielectric gratings
• Casimir-Lifshitz force out of thermal equilibrium
• Thermal Casimir vs Casimir-Polder forces: Equilibrium and non-equilibrium forces
• Near-field induction heating of metallic nanoparticles due to infrared magnetic dipole contribution
• Proximity Effects in Radiative Transfer

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