Excitonic effects on high-harmonic generation in Mott insulators

Abstract

To study excitonic effects on high-harmonic generation (HHG) in Mott insulators, we investigate pumped nonequilibrium dynamics in the one-dimensional extended Hubbard model. By employing time-dependent calculations based on the exact diagonalization and infinite time-evolving block decimation methods, we find the strong enhancement of the HHG intensity around the exciton energy. The subcycle analysis in the sub-Mott-gap regime shows that the intensity region of the time-resolved spectrum around the exciton energy splits into two levels and oscillates following the driving electric field. This excitonic dynamics is qualitatively different from the dynamics of free doublon and holon but favorably contributes to HHG in the Mott insulator.

References in corpus (10)

• The density-matrix renormalization group in the age of matrix product states
• Classical simulation of infinite-size quantum lattice systems in one spatial dimension
• The iTEBD algorithm beyond unitary evolution
• Strong-Field Perspective on High-Harmonic Radiation from Bulk Solids
• Multi-level perspective on high-order harmonic generation in solids
• Diabatic Mechanisms of Higher-Order Harmonic Generation in Solid-State Materials under High-Intensity Electric Fields
• Phase diagram of the one-dimensional half-filled extended Hubbard model
• High-order harmonic generation in solid slabs beyond the single active electron
• Producing Coherent Excitations in Pumped Mott Antiferromagnetic Insulators
• Finite-temperature photoemission in the extended Falicov-Kimball model: a case study for Ta${}_2$NiSe${}_5$

Cited by in corpus (3)

• Anomalous temperature dependence of high-harmonic generation in Mott insulators
• Doping effects in high-harmonic generation from correlated systems
• Wannier-Stark ladders and Stark shifts of excitons in Mott insulators