Light Transmission Through Two Dimensional Magneto-Optical Slit Array

TL;DR

This paper investigates how two-dimensional magneto-optical slit arrays enable extraordinary optical transmission and tunability through negative effective permittivity induced by magnetic bias, confirmed by mode matching and full wave simulations.

Contribution

It introduces a detailed analysis of magneto-optical slit arrays showing their potential for frequency-selective and tunable optical transmission based on tensor permittivity effects.

Findings

Magneto-optical materials exhibit negative effective permittivity under magnetic bias.

Slit arrays enable extraordinary optical transmission.

The structure's frequency response can be tuned with magnetic bias.

Abstract

In this paper, metallic behavior of magneto optic materials in slit arrays under the incident of TM wave is analyzed by mode matching technique and confirmed by full wave simulations. It is shown that tensor electric permittivity of such materials under a static magnetic field bias can result in negative effective permittivity and if placed in a periodic two dimensional structure known as slit array, results in extraordinary optical transmission. It is also shown that this structure acts as a highly frequency selective surface tunable with magnetic bias change.