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Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

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Published on: November 1, 2013

High harmonic generation in graphene quantum dots.

Ahmal Jawad Zafar¹, Aranyo Mitra¹, Vadym Apalkov¹

¹Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, United States of America.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|February 8, 2024

Summary

This summary is machine-generated.

We theoretically investigate high harmonic generation in graphene quantum dots. Changing quantum dot size controls radiation spectra, decreasing low harmonic intensity while increasing cutoff frequency with pulse intensity.

Keywords:

graphene high harmonic generation nonlinear optics quantum dot

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Area of Science:

Condensed Matter Physics
Quantum Optics
Materials Science

Background:

Graphene quantum dots (QDs) exhibit unique electronic properties.
High harmonic generation (HHG) is a key process in nonlinear optics.
Understanding HHG in nanostructured materials is crucial for novel light sources.

Purpose of the Study:

To theoretically study high harmonic generation in disk graphene quantum dots.
To investigate the influence of quantum dot size on generated radiation spectra.
To explore the role of pulse intensity on spectral characteristics.

Main Methods:

Effective Dirac-type model for graphene quantum dots.
Length gauge formalism to describe light-matter interaction.
Theoretical analysis of high harmonic spectra.

Main Results:

Generated radiation spectra are controllable by quantum dot radius.
Increasing QD radius decreases low harmonic intensities.
Cutoff frequency increases with QD radius and is sensitive to pulse intensity.

Conclusions:

Graphene quantum dots are promising for controlled high harmonic generation.
Quantum dot size offers a tunable parameter for HHG spectra.
Pulse intensity significantly affects spectral cutoff, offering further control.