Non-trivial topological structure of heat and momentum flux radiated by magneto-optical nanoparticles

TL;DR

This paper reveals that heat and momentum fluxes radiated by magneto-optical nanoparticles form vortex-like structures influenced by magnetic fields and optical resonances, with potential applications in nanoscale thermal management and energy storage.

Contribution

It demonstrates the topological and geometric nature of heat and momentum fluxes in magneto-optical nanoparticles under magnetic fields, linking flux patterns to optical resonances.

Findings

Flux lines form vortex-like structures around nanoparticles.

Vortex orientation correlates with optical resonance topological charges.

Implications for nanoscale thermal management and energy storage.

Abstract

In the present Letter we investigate the heat and momentum fluxes radiated by a hot magneto-optical nanoparticle in its surrounding under the action of an external magnetic field. We show that the flux lines circulate in a confined region at nanometric distance from the particle around the axis of magnetic field in a vortex-like configuration. Moreover we prove that the spatial orientation of these vortices (clockwise or counterclockwise) is associated to the contribution of optical resonances with topological charges m = +1 or m = -1 to the thermal emission. This work paves the way to a geometric description of heat and momentum transport in lattices of magneto-optical particles. Moreover it could have important applications in the field of energy storage as well as in thermal management at nanoscale.