Harmonic generation in bent graphene with artificially enhanced spin-orbit coupling

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Abstract

We theoretically investigate the nonlinear response of bent graphene in the presence of artificially enhanced spin-orbit coupling, which can occur either via adatom deposition or by placing the sheet of bent graphene in contact with a spin-orbit-active substrate. We discuss the interplay between the spin-orbit coupling and the artificial magnetic field generated by the bending for the cases of both Rashba and intrinsic spin-orbit coupling. For the latter, we introduce a spin-field interaction Hamiltonian addressing directly the electron spin as a degree of freedom. Our findings reveal that in this case, by controlling the amount of spin-orbit coupling, it is possible to significantly tune the spectrum of the nonlinear signal, achieving, in principle, efficient conversion of light from the terahertz to UV region.

Original languageEnglish
Article number043517
Number of pages9
JournalPhysical Review A
Volume106
Issue number4
DOIs
Publication statusPublished - Oct 2022
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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