articleScienceMay 18, 2017Closed access

High-harmonic generation in graphene enhanced by elliptically polarized light excitation

NYN. YoshikawaTTTomohiro TamayaKTKōichiro Tanaka

Kyoto University

PubMed
Indexed incrossrefpubmed

Abstract

The electronic properties of graphene can give rise to a range of nonlinear optical responses. One of the most desirable nonlinear optical processes is high-harmonic generation (HHG) originating from coherent electron motion induced by an intense light field. Here, we report on the observation of up to ninth-order harmonics in graphene excited by mid-infrared laser pulses at room temperature. The HHG in graphene is enhanced by an elliptically polarized laser excitation, and the resultant harmonic radiation has a particular polarization. The observed ellipticity dependence is reproduced by a fully quantum mechanical treatment of HHG in solids. The zero-gap nature causes the unique properties of HHG in graphene,…

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651
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41.53
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Authors

3

Topics & keywords

Topics
Keywords
  • Graphene
  • High harmonic generation
  • Elliptical polarization
  • Optoelectronics
  • Wavelength
  • Ultraviolet light
  • Second-harmonic generation
  • Excitation
UN Sustainable Development Goals
  • Affordable and clean energy
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