On the extreme nonlinear optics of graphene nanoribbons in the strong coherent radiation fields

TL;DR

This paper develops a microscopic theory to study high-order harmonic generation in graphene nanoribbons under intense laser fields, highlighting the influence of bandgap and Fermi energy on nonlinear optical responses.

Contribution

It introduces a novel microscopic model for extreme nonlinear optics in GNRs under strong coherent radiation, with numerical solutions revealing key parameters affecting harmonic generation.

Findings

Bandgap width significantly affects harmonic generation.

Fermi energy level influences the efficiency of high-order harmonics.

Numerical solutions demonstrate the nonlinear optical response of GNRs.

Abstract

The generation of high-order harmonics in quasi-one-dimensional graphene nanoribbons (GNRs) initiated by intense coherent radiation is investigated. A microscopic theory describing the extreme nonlinear optical response of GNRs is developed. The closed set of differential equations for the single-particle density matrix at the GNR-strong laser field multiphoton interaction is solved numerically. The obtained solutions indicate the significance of the bandgap width and Fermi energy level on the high-order harmonic generation process in GNRs.