High-harmonic spectroscopy of strongly bound excitons in solids
Simon Vendelbo Bylling Jensen, Lars Bojer Madsen, Ángel Rubio, Nicolas Tancogne-Dejean
Abstract
We explore the nonlinear response of ultrafast strong-field-driven excitons in a one-dimensional solid with ab initio simulations. We demonstrate from our simulations and analytical model that a finite population of excitons imprints unique signatures to the high-harmonic spectra of materials. We show the exciton population can be retrieved from the spectra. We further demonstrate signatures of exciton recombination and that a shift of the exciton level is imprinted into the harmonic signal. The results open the door to high-harmonic spectroscopy of excitons in condensed-matter systems.
Topics & Concepts
ExcitonBiexcitonSpectroscopyHarmonicAb initioPopulationMolecular physicsUltrashort pulsePhysicsSpectral lineAtomic physicsCondensed matter physicsQuantum mechanicsLaserSociologyDemographySpectroscopy and Quantum Chemical StudiesLaser-Matter Interactions and ApplicationsSpectroscopy and Laser Applications