Near-field radiative heat transfer between one-dimensional magneto-photonic crystals

TL;DR

This paper theoretically investigates how an external magnetic field influences near-field radiative heat transfer between one-dimensional magneto-photonic crystals, revealing magnetic-field-induced hyperbolic modes reduce heat transfer without polarization conversion.

Contribution

It demonstrates the role of magnetic-field-induced hyperbolic modes in controlling near-field heat transfer in magneto-photonic structures, a novel insight.

Findings

External magnetic field reduces heat transfer by suppressing surface polariton waves.

Reduction in heat transfer is due to hyperbolic modes, not polarization conversion.

Heat transfer varies with gap size and magnetic field strength.

Abstract

We present a theoretical study of the effect of an external dc magnetic field in the near-field radiative heat transfer between two one-dimensional magneto-photonic crystals with unit cells comprising a magneto-optical layer made of n-doped InSb and a dielectric layer. We find that in absence of an external field, and depending on the gap size, the radiative heat transfer between these multilayer structures can be larger or smaller than that of the case of two InSb infinite plates. On the other hand, when an external magnetic field is applied, the near-field radiative heat transfer is reduced as a consequence of the suppression of hybridized surface polariton waves that are supported for transverse magnetic polarized light. We show that such reduction is exclusively due to the appearance of magnetic-field induced hyperbolic modes, and not to the polarization conversion in this magneto-optical system.