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TitleProbing nonlocal effects in metals with graphene plasmons
Author(s)Dias, Eduardo J. C.
Iranzo, David Alcaraz
Gonçalves, P. A. D.
Hajati, Yaser
Bludov, Yuliy V.
Jauho, Antti-Pekka
Mortensen, N. Asger
Koppens, Frank H. L.
Peres, N. M. R.
Issue date2018
PublisherAmerican Physical Society (APS)
JournalPhysical Review B - Condensed Matter and Materials Physics
Abstract(s)In this paper we analyze the effects of nonlocality on the optical properties of a system consisting of a thin metallic film separated from a graphene sheet by a hexagonal boron nitride (hBN) layer. We show that nonlocal effects in the metal have a strong impact on the spectrum of the surface plasmon-polaritons on graphene. If the graphene sheet is shaped into a grating, we show that the extinction curves can be used to shed light on the importance of nonlocal effects in metals. Therefore, graphene surface plasmons emerge as a tool for probing nonlocal effects in metallic nanostructures, including thin metallic films. As a byproduct of our study, we show that nonlocal effects lead to smaller losses for the graphene plasmons than what is predicted by a local calculation. We show that these effects can be very well mimicked using a local theory with an effective spacer thickness larger than its actual value.
Appears in Collections:CDF - CEP - Artigos/Papers (with refereeing)

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