High-harmonic spectra of hexagonal nanoribbons from real-space time-dependent Schr\"odinger calculations

TL;DR

This paper uses real-space time-dependent Schrödinger calculations to analyze high-harmonic spectra in hexagonal nanoribbons, revealing how symmetry influences harmonic emission and advancing ultrafast optical imaging techniques.

Contribution

It introduces a detailed computational approach to study high-harmonic generation in finite hexagonal nanoribbons, highlighting the role of symmetry in harmonic spectra.

Findings

Harmonic spectra depend on nanoribbon symmetry

Armchair and zig-zag configurations show distinct harmonic patterns

Symmetry explains the presence and intensity of emitted harmonics

Abstract

High-harmonic spectroscopy is a promising candidate for imaging electronic structures and dynamics in condensed matter by all-optical means and with unprecedented temporal resolution. We investigate harmonic spectra from finite, hexagonal nanoribbons, such as graphene and hexagonal boron nitride, in armchair and zig-zag configuration. The symmetry of the system explains the existence and intensity of the emitted harmonics.