High harmonic generation in Landau-quantized graphene subjected to a strong electromagnetic radiation

TL;DR

This paper investigates high harmonic generation in Landau-quantized graphene under strong electromagnetic radiation, demonstrating efficient harmonic production across various frequencies and impurity levels.

Contribution

It introduces a detailed analysis of nonlinear optical responses in Landau-quantized graphene, highlighting conditions for efficient high harmonic generation with intense fields.

Findings

High harmonic generation is efficient when the electric field work exceeds pump photon energy.

Harmonic generation occurs over a wide range of frequencies and intensities.

Impurities and Landau level broadening do not significantly hinder harmonic generation.

Abstract

We study nonlinear optical response of Landau quantized graphene to an intense electromagnetic wave. In particular, we consider high harmonic generation process. It is shown that one can achieve efficient generation of high harmonics with strong radiation fields -- when the work of the wave electric field on the magnetic length is larger than pump photon energy. At that high harmonics generation process takes place for a wide range of the pump wave frequencies and intensities even for significant broadening of Landau levels because of impurities in graphene.