Title:
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Transient nonlinear plasmonics in nanostructured graphene
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Author:
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COX, JOEL D.; GARCÍA DE ABAJO, F. JAVIER
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Other authors:
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Universitat Politècnica de Catalunya. Institut de Ciències Fotòniques |
Abstract:
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Plasmons in highly doped graphene offer the means to dramatically enhance light absorption in the atomically thin
material. Ultimately the absorbed light energy induces an increase in electron temperature, accompanied by large
shifts in the chemical potential. This intrinsically incoherent effect leads to strong intensity-dependent modifications
of the optical response, complementing the remarkable coherent nonlinearities arising in graphene due to interband
transitions and anharmonic intraband electron motion. Through rigorous time-domain quantum-mechanical simulations
of graphene nanoribbons, we show that the incoherent mechanism dominates over the coherent response for
the high levels of intensity required to trigger nonperturbative optical phenomena such as saturable absorption. We
anticipate that these findings will elucidate the role of coherent and incoherent nonlinearities for future studies and
applications of plasmon-assisted nonlinear optics. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Física -Graphene -grafè -Grafè |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
Published by:
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OSA
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