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dc.contributor.authorHosseininejad, Seyed Ehsan
dc.contributor.authorRouhi, Kasra
dc.contributor.authorNeshat, Mohammad
dc.contributor.authorFaraji-Dana, Reza
dc.contributor.authorCabellos Aparicio, Alberto
dc.contributor.authorAbadal Cavallé, Sergi
dc.contributor.authorAlarcón Cot, Eduardo José
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.date.accessioned2019-04-04T05:48:00Z
dc.date.available2019-04-04T05:48:00Z
dc.date.issued2019-02-27
dc.identifier.citationHosseininejad, S. E. [et al.]. Reprogrammable graphene-based metasurface mirror with adaptive focal point for THz imaging. "Scientific reports", 27 Febrer 2019, vol. 9, article 2868, p. 1-9.
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/2117/131234
dc.description.abstractRecent emergence of metasurfaces has enabled the development of ultra-thin flat optical components through different wavefront shaping techniques at various wavelengths. However, due to the non-adaptive nature of conventional metasurfaces, the focal point of the resulting optics needs to be fixed at the design stage, thus severely limiting its reconfigurability and applicability. In this paper, we aim to overcome such constraint by presenting a flat reflective component that can be reprogrammed to focus terahertz waves at a desired point in the near-field region. To this end, we first propose a graphene-based unit cell with phase reconfigurability, and then employ the coding metasurface approach to draw the phase profile required to set the focus on the target point. Our results show that the proposed component can operate close to the diffraction limit with high focusing range and low focusing error. We also demonstrate that, through appropriate automation, the reprogrammability of the metamirror could be leveraged to develop compact terahertz scanning and imaging systems, as well as novel reconfigurable components for terahertz wireless communications.
dc.format.extent9 p.
dc.language.isoeng
dc.publisherNature
dc.rightsAttribution 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria electrònica::Microelectrònica::Electrònica molecular
dc.subject.lcshGraphene
dc.subject.lcshSurfaces (Technology)
dc.subject.lcshTerahertz technology
dc.subject.otherMetamaterials
dc.subject.otherPlasmons
dc.subject.otherGradient metasurface
dc.titleReprogrammable graphene-based metasurface mirror with adaptive focal point for THz imaging
dc.typeArticle
dc.subject.lemacGrafè
dc.subject.lemacSuperfícies (Tecnologia)
dc.contributor.groupUniversitat Politècnica de Catalunya. CBA - Sistemes de Comunicacions i Arquitectures de Banda Ampla
dc.contributor.groupUniversitat Politècnica de Catalunya. EPIC - Energy Processing and Integrated Circuits
dc.identifier.doi10.1038/s41598-019-39266-3
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.nature.com/articles/s41598-019-39266-3
dc.rights.accessOpen Access
local.identifier.drac24025407
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/736876/EU/VisorSurf/VISORSURF
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO/1PE/PCIN-2015-012
local.citation.authorHosseininejad, S. E.; Rouhi, K.; Neshat, M.; Faraji-Dana, R.; Albert Cabellos-Aparicio; Abadal, S.; Alarcon, E.
local.citation.publicationNameScientific reports
local.citation.volume9
local.citation.numberArticle number 2868
local.citation.startingPage1
local.citation.endingPage9


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Attribution 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution 3.0 Spain