High harmonic generation in triangular graphene quantum dots

TL;DR

This paper develops a microscopic dynamical Hartree-Fock model to study high harmonic generation in triangular graphene quantum dots under intense laser fields, revealing the influence of edge type, size, bandgap, and field strength.

Contribution

It introduces a detailed theoretical framework for nonlinear optical response in graphene quantum dots, emphasizing the role of geometric and electronic properties in harmonic generation.

Findings

Edge type significantly affects harmonic generation.

Lateral size influences the efficiency of high harmonic emission.

Laser field strength modulates the harmonic spectrum.

Abstract

Higher harmonic generation in plane graphene quantum dots initiated by intense coherent radiation is investigated, using dynamical Hartree-Fock mean-field theory. A microscopic theory describing the extreme nonlinear optical response of plane graphene quantum dots is developed. The closed set of differential equations for the single-particle density matrix at the graphene quantum dots-strong laser field multiphoton interaction is solved numerically. The obtained solutions indicate the significance of the type of edge and lateral size, and bandgap and laser field strength in the high harmonic generation process on the triangular graphene quantum dot.