Giant thermal magnetoresistance in plasmonic structures

TL;DR

This paper predicts a significant increase in thermal resistance in magneto-optical plasmonic structures under magnetic fields, driven by spectral changes in localized surface waves, with potential applications in thermal management.

Contribution

It introduces the concept of giant thermal magnetoresistance in plasmonic structures and demonstrates its dependence on magnetic field strength at room temperature.

Findings

Resistance can nearly double with 2 T magnetic field.

Spectral dependence of localized surface waves causes the resistance change.

The effect is significant at room temperature.

Abstract

A giant thermal magnetoresistance is predicted for the electromagnetic transport of heat in magneto-optical plasmonic structures. In chains of InSb-Ag nanoparticles at room temperature, we found that the resistance can be increased by almost a factor of 2 with magnetic fields of 2 T. We show that this important change results from the strong spectral dependence of localized surface waves on the magnitude of the magnetic field.