Graphene Based Waveguide Polarizers: In-Depth Physical Analysis and Relevant Parameters

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dc.contributor.authorDe Oliveira R.E.P.
dc.contributor.authorDe Matos C.J.S.
dc.date.accessioned2024-03-13T00:55:55Z
dc.date.available2024-03-13T00:55:55Z
dc.date.issued2015
dc.description.abstract© 2015, Nature Publishing Group. All rights reserved.Optical polarizing devices exploiting graphene embedded in waveguides have been demonstrated in the literature recently and both the TE- and TM-pass behaviors were reported. The determination of the passing polarization is usually attributed to graphene's Fermi level (and, therefore, doping level), with, however, no direct confirmation of this assumption provided. Here we show, through numerical simulation, that rather than graphene's Fermi level, the passing polarization is determined by waveguide parameters, such as the superstrate refractive index and the waveguide's height. The results provide a consistent explanation for experimental results reported in the literature. In addition, we show that with an accurate graphene modeling, a waveguide cannot be switched between TE pass and TM pass via Fermi level tuning. Therefore, the usually overlooked contribution of the waveguide design is shown to be essential for the development of optimized TE- or TM-pass polarizers, which we show to be due to the control it provides on the fraction of the electric field that is tangential to graphene.
dc.description.volume5
dc.identifier.doi10.1038/srep16949
dc.identifier.issn2045-2322
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36126
dc.relation.ispartofScientific Reports
dc.rightsAcesso Aberto
dc.titleGraphene Based Waveguide Polarizers: In-Depth Physical Analysis and Relevant Parameters
dc.typeArtigo
local.scopus.citations61
local.scopus.eid2-s2.0-84947779117
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84947779117&origin=inward
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