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Transverse phase matching of high-order harmonic generation in single-layer graphene

Área de investigaciónMatemáticas, Física e Ingeniería
TítuloTransverse phase matching of high-order harmonic generation in single-layer graphene
Tipo de publicaciónArtículo de revista
Año de publicación2021
AutoresBoyero-García, R, Zurrón-Cifuentes, O, Plaja, L, Hernández-García, C
RevistaOpt. Express
Volumen29
Número2
Páginas2488–2500
KeywordsAttosecond pulses, Extreme ultraviolet, Laser beams, Nonlinear optics, Phase matching, Strong field physics
Abstract

The efficiency of high-harmonic generation (HHG) from a macroscopic sample is strongly linked to the proper phase matching of the contributions from the microscopic emitters. We develop a combined micro$+$macroscopic theoretical model that allows us to distinguish the relevance of high-order harmonic phase matching in single-layer graphene. For a Gaussian driving beam, our simulations show that the relevant HHG emission is spatially constrained to a phase-matched ring around the beam axis. This remarkable finding is a direct consequence of the non-perturbative behavior of HHG in graphene&\#x2014;whose harmonic efficiency scaling is similar to that already observed in gases&\#x2014; and bridges the gap between the microscopic and macroscopic HHG in single-layer graphene.

DOI10.1364/OE.412639