Tunable Goos-H\"{a}nchen shift and polarization beam splitter in electro-optic crystals

TL;DR

This paper explores how electro-optic crystals can be used to control the lateral shift and polarization splitting of light beams, enabling tunable optical devices through electric field adjustments.

Contribution

It introduces a method to achieve tunable Goos-Hänchen shifts and polarization beam splitting in electro-optic crystals using the Pockels effect, supported by numerical simulations.

Findings

Positive and negative lateral shifts are controllable via electric fields.

A new polarization beam splitter design based on lateral shifts.

Numerical simulations confirm the theoretical predictions.

Abstract

We have investigated the tunable lateral shift and polarization beam splitting of the transmitted light beam through electro-optic crystals, based on the Pockels effect. The positive and negative lateral shifts could be easily controlled by adjusting the permittivity tensor, which is modulated by the external applied electric field. An alternative way to realize the polarization beam splitter was also proposed by the polarization-dependent lateral shifts. Numerical simulations for Gaussian-shaped incident beam have demonstrated the above theoretical results obtained by stationary phase method. All these phenomena have potential applications in optical devices.