Nonlinear plasmonic response in atomically thin metal films

Nanoscale nonlinear optics is limited by the inherently weak nonlinear response of conventional materials and the small light–matter interaction volumes available in nanostructures. Plasmonic excitations can alleviate these limitations through subwavelength light focusing, boosting optical near fiel...

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Autores principales:	Rodríguez Echarri Álvaro, Cox Joel D., Iyikanat Fadil, García de Abajo F. Javier
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	atomically thin films nonlinear optics nanophotonics plasmon polaritons scanning near-field optical microscopy (snom) Physics QC1-999
Acceso en línea:	https://doaj.org/article/c30100daf7334a299265348362b529b7
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id	oai:doaj.org-article:c30100daf7334a299265348362b529b7
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spelling	oai:doaj.org-article:c30100daf7334a299265348362b529b72021-12-05T14:10:56ZNonlinear plasmonic response in atomically thin metal films2192-861410.1515/nanoph-2021-0422https://doaj.org/article/c30100daf7334a299265348362b529b72021-10-01T00:00:00Zhttps://doi.org/10.1515/nanoph-2021-0422https://doaj.org/toc/2192-8614Nanoscale nonlinear optics is limited by the inherently weak nonlinear response of conventional materials and the small light–matter interaction volumes available in nanostructures. Plasmonic excitations can alleviate these limitations through subwavelength light focusing, boosting optical near fields that drive the nonlinear response, but also suffering from large inelastic losses that are further aggravated by fabrication imperfections. Here, we theoretically explore the enhanced nonlinear response arising from extremely confined plasmon polaritons in few-atom-thick crystalline noble metal films. Our results are based on quantum-mechanical simulations of the nonlinear optical response in atomically thin metal films that incorporate crucial electronic band structure features associated with vertical quantum confinement, electron spill-out, and surface states. We predict an overall enhancement in plasmon-mediated nonlinear optical phenomena with decreasing film thickness, underscoring the importance of surface and electronic structure in the response of ultrathin metal films.Rodríguez Echarri ÁlvaroCox Joel D.Iyikanat FadilGarcía de Abajo F. JavierDe Gruyterarticleatomically thin filmsnonlinear opticsnanophotonicsplasmon polaritonsscanning near-field optical microscopy (snom)PhysicsQC1-999ENNanophotonics, Vol 10, Iss 16, Pp 4149-4159 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	atomically thin films nonlinear optics nanophotonics plasmon polaritons scanning near-field optical microscopy (snom) Physics QC1-999
spellingShingle	atomically thin films nonlinear optics nanophotonics plasmon polaritons scanning near-field optical microscopy (snom) Physics QC1-999 Rodríguez Echarri Álvaro Cox Joel D. Iyikanat Fadil García de Abajo F. Javier Nonlinear plasmonic response in atomically thin metal films
description	Nanoscale nonlinear optics is limited by the inherently weak nonlinear response of conventional materials and the small light–matter interaction volumes available in nanostructures. Plasmonic excitations can alleviate these limitations through subwavelength light focusing, boosting optical near fields that drive the nonlinear response, but also suffering from large inelastic losses that are further aggravated by fabrication imperfections. Here, we theoretically explore the enhanced nonlinear response arising from extremely confined plasmon polaritons in few-atom-thick crystalline noble metal films. Our results are based on quantum-mechanical simulations of the nonlinear optical response in atomically thin metal films that incorporate crucial electronic band structure features associated with vertical quantum confinement, electron spill-out, and surface states. We predict an overall enhancement in plasmon-mediated nonlinear optical phenomena with decreasing film thickness, underscoring the importance of surface and electronic structure in the response of ultrathin metal films.
format	article
author	Rodríguez Echarri Álvaro Cox Joel D. Iyikanat Fadil García de Abajo F. Javier
author_facet	Rodríguez Echarri Álvaro Cox Joel D. Iyikanat Fadil García de Abajo F. Javier
author_sort	Rodríguez Echarri Álvaro
title	Nonlinear plasmonic response in atomically thin metal films
title_short	Nonlinear plasmonic response in atomically thin metal films
title_full	Nonlinear plasmonic response in atomically thin metal films
title_fullStr	Nonlinear plasmonic response in atomically thin metal films
title_full_unstemmed	Nonlinear plasmonic response in atomically thin metal films
title_sort	nonlinear plasmonic response in atomically thin metal films
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/c30100daf7334a299265348362b529b7
work_keys_str_mv	AT rodriguezecharrialvaro nonlinearplasmonicresponseinatomicallythinmetalfilms AT coxjoeld nonlinearplasmonicresponseinatomicallythinmetalfilms AT iyikanatfadil nonlinearplasmonicresponseinatomicallythinmetalfilms AT garciadeabajofjavier nonlinearplasmonicresponseinatomicallythinmetalfilms
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Nonlinear plasmonic response in atomically thin metal films

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