# Influence of the linear magneto-electric effect on the lateral shift of light reflected from a magneto-electric film

## TL;DR

This paper theoretically examines how the linear magneto-electric effect influences the lateral shift of infrared light reflected from a magnetic film, revealing a significant enhancement and nonreciprocal behavior due to magneto-electric coupling.

## Contribution

It introduces a theoretical model accounting for the linear magneto-electric interaction to analyze the lateral shift of reflected light from magnetic films.

## Key findings

- Magneto-electric coupling enhances lateral shift amplitude six-fold.
- Reversing magnetization causes a sign change in the lateral shift.
- The study provides insights into nonreciprocal optical effects in magnetic films.

## Abstract

We present a theoretical investigation of the lateral shift of an infrared light beam reflected from a magnetic film deposited on a non-magnetic dielectric substrate, taking into account the linear magneto-electric interaction in the magnetic film. We use the stationary phase method to evaluate the lateral shift. It is shown that the magneto-electric coupling leads to a six-fold enhancement of the lateral shift amplitude of a p-(s-) polarized incident beam reflected into a s-(p-) polarized beam. A reversal of the magnetization in the film leads to a nonreciprocal sign change of the lateral shift.

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Source: https://tomesphere.com/paper/1903.02023