Factorization of high-harmonic generation yields in impurity-doped materials

TL;DR

This paper develops a theoretical framework for understanding high-harmonic generation in impurity-doped materials, demonstrating a factorization approach that parallels gas-phase HHG and enabling new material studies.

Contribution

It introduces a factorization method for HHG yields in impurity-doped materials and validates it with the quantitative rescattering model, bridging solid-state and atomic HHG theories.

Findings

HHG yields factorize into electron wave packet and recombination cross section

The rescattering model accurately reproduces TDSE results

New methods for studying impurities in materials using strong-field physics

Abstract

We present a theoretical investigation of high-harmonic generation (HHG) from impurity-doped materials using the time-dependent Schr\"odinger equation (TDSE) approach. We demonstrate the factorization of HHG yields as a product of an electron wave packet and the recombination cross section, in analogy to HHG from atoms and molecules in the gas phase. Furthermore, we show that the quantitative rescattering model based on this factorization accurately reproduces the TDSE results. This opens up new possibilities to study impurities in materials using the available techniques from strong-field physics.