One-way surface magnetoplasmon cavity and its application for nonreciprocal devices

TL;DR

This paper presents a theoretical analysis of a magneto-optical surface plasmon cavity that enables unidirectional surface wave circulation, laying the groundwork for nonreciprocal device applications such as circulators.

Contribution

It introduces a novel one-way surface magnetoplasmon cavity mechanism and demonstrates its potential for nonreciprocal device design.

Findings

The cavity supports unidirectional surface wave circulation.

Interaction with waveguides enables nonreciprocal device concepts.

Provides theoretical foundation for future nonreciprocal components.

Abstract

We theoretically analyze surface magnetoplasmon modes in a compact circular cavity made of magneto-optical material under a static magnetic field. Such a cavity provides two different physical mechanisms for the surface wave to circulate in a unidirectional manner around the cavity, which offers more freedom to realize one-way surface wave. We also show the interaction between this one-way cavity and waveguides, through an example of a circulator, which lays the fundamental groundwork for potential nonreciprocal devices.