Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics

TL;DR

This paper reviews recent advances in high harmonic generation-based time-resolved photoemission spectroscopy, which enables detailed exploration of electron-phonon interactions and non-equilibrium dynamics in quantum materials at femtosecond timescales.

Contribution

It summarizes recent studies using HHG-driven time- and angle-resolved photoemission spectroscopy to investigate quantum materials, emphasizing electron-phonon interactions and non-equilibrium phenomena.

Findings

Revealed non-equilibrium electron-phonon couplings in quantum materials.

Demonstrated the capability of HHG-based spectroscopy to probe ultrafast dynamics.

Highlighted the potential for studying complex many-body interactions.

Abstract

Recent advancements in ultrafast laser systems and high harmonic generation (HHG) techniques have enabled time-resolved photoemission spectroscopy on femtosecond timescales, opening up unprecedented opportunities to explore quantum materials in both time and momentum space. In this review, we present recent representative studies utilizing HHG-laser-based time- and angle-resolved photoemission spectroscopy for a variety of quantum materials. We particularly highlight electron-phonon interactions and non-equilibrium dynamics in time and frequency domain, through which rich information about non-equilibrium electron-phonon couplings and related phenomena has been clearly revealed.