# Attosecond electro-optic effect in zinc sulfide induced by a laser field

## TL;DR

This paper predicts an ultrafast anisotropic electro-optic effect in zinc sulfide induced by a laser field, revealing a phase shift linked to the dynamical Franz-Keldysh effect through numerical pump-probe simulations.

## Contribution

It introduces a numerical simulation approach to study the attosecond electro-optic effect in ZnS and uncovers the phase shift related to the dynamical Franz-Keldysh effect.

## Key findings

- Phase shift in anisotropic response matches dynamical Franz-Keldysh effect
- Dielectric function modulation occurs at high photon energies (~42 eV)
- Effect is sensitive to probe frequency near the band gap

## Abstract

An ultrafast anisotropic electro-optic effect of the zinc sulfide crystal is predicted employing a numerical pump-probe simulation. The numerical results indicate that the time-dependence of the anisotropic response of ZnS exhibits a phase shift with respect to the pump laser field. The phase shift coincides with the time-resolved dynamical Franz-Keldysh effect, which is the modulation of the isotropic part of the dielectric function. While the probe frequency dependence around the band gap is not intense, it becomes intense at higher photon energies of approximately 42~eV.