Nonreciprocal rotating power flow within plasmonic nanostructures

TL;DR

This paper theoretically demonstrates that magneto-optical effects can induce nonreciprocal, rotating power flow within plasmonic nanostructures, enabling nanoscale control of electromagnetic fields.

Contribution

It introduces an analytical model predicting time-reversal symmetry breaking and shows numerical evidence of near-zone power flow rotation in hybrid plasmonic structures.

Findings

Strong magneto-optically induced nonreciprocity observed

Near-zone power flow rotation demonstrated

Potential for nanoscale plasmonic tuning established

Abstract

We theoretically explore the notion of nonreciprocal near-zone manipulation of electromagnetic fields within subwavelength plasmonic nanostructures embedded in magneto-optical materials. We derive an analytical model predicting a strong, magneto-optically induced time-reversal symmetry breaking of localized plasmonic resonances in topologically symmetric structures. Our numerical simulations of plasmon excitations reveal a considerable near-zone power flow rotation within such hybrid nanostructures, demonstrating nanoscale nonreciprocity. This can be considered as another mechanism for tuning plasmonic phenomena at the nanoscale.