Enhanced third-harmonic generation induced by nonlinear field resonances in plasmonic-graphene metasurfaces

Nonlinear metasurfaces offer new paradigm for boosting optical effect beyond limitations of conventional materials. In this work, we present an alternative way to produce pronounced third-harmonic generation (THG) based on nonlinear field resonances rather than linear field enhancement, which is a typical strategy for achieving a strong nonlinear response. By designing and studying a nonlinear plasmonic-graphene metasurface at terahertz regime with hybrid-guided modes and bound states in the continuum modes, it is found that a THG with a narrow bandwidth can be observed, thanks to the strong resonance generated between a weak THG field and these modes. Such strong nonlinear field resonance greatly enhances the photon-photon interactions, thus resulting in a large effective nonlinear coefficient of the whole system. This finding provides new opportunity for studying nonlinear optical metasurfaces.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:28

Enthalten in:

Optics express - 28(2020), 9 vom: 27. Apr., Seite 13234-13242

Sprache:

Englisch

Beteiligte Personen:

Liu, Yulian [VerfasserIn]
Zhu, Shan [VerfasserIn]
Zhou, Qingjia [VerfasserIn]
Cao, Yanyan [VerfasserIn]
Fu, Yangyang [VerfasserIn]
Gao, Lei [VerfasserIn]
Chen, Huanyang [VerfasserIn]
Xu, Yadong [VerfasserIn]

Links:

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Themen:

Journal Article

Anmerkungen:

Date Revised 14.05.2020

published: Print

Citation Status PubMed-not-MEDLINE

doi:

10.1364/OE.391294

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM309867673