Spatially dispersive metasurfaces

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Asadchy, Viktar 2017-08-18T09:02:51Z 2017-08-18T09:02:51Z 2017
dc.identifier.isbn 978-952-60-7558-7 (electronic)
dc.identifier.isbn 978-952-60-7559-4 (printed)
dc.identifier.issn 1799-4942 (electronic)
dc.identifier.issn 1799-4934 (printed)
dc.identifier.issn 1799-4934 (ISSN-L)
dc.description.abstract Natural materials and substances possess a rich variety of electromagnetic properties over the entire electromagnetic spectrum. Despite this diversity, nature does not equip us with a full set of possible material tools for controlling electromagnetic waves and realizing all physically possible effects. Only the use of artificial, engineered substances can give us full control over electromagnetic properties of materials. For instance, while spatial dispersion effects are weak in natural materials, they can be strongly pronounced in artificially engineered composite materials, metamaterials. Metamaterials consist of inclusions whose dimensions are small but comparable with the operating wavelength, which enables existence of strong spatial dispersion effects in them such as bi-anisotropy, magnet-less magnetism, and gyrotropy. This dissertation is devoted to the young and scantily explored field of spatially dispersive metasurfaces. Metasurfaces represent a two-dimensional arrangement of sub-wavelength inclusions engineered to manipulate in a prescribed fashion incident electromagnetic radiation. The first half of the dissertation contains a theoretical review of the research field essential for understanding of the obtained results outlined in the second half. Presentation of novel results can be broken down into three parts. The first part describes a semi-analytical technique for polarizability extraction of an arbitrary electrically small bi-anisotropic scatterer. Subsequently, the technique was exploited for the design of a novel scatterer with extremely pronounced spatial dispersion of the first order. The second part outlines the key ideas behind two designed spatially dispersive metasurfaces: A resonant gradient reflector and an absorber transparent outside the resonance band. It is demonstrated that such shadow-free operation of the metasurfaces requires spatial dispersion effects. The last part presents the exact synthesis of gradient metasurfaces for ideal wavefront control in reflection and transmission regimes. The fundamental importance of spatial dispersion in such metasurfaces is demonstrated. As a proof of concept, an optical metasurface for perfect anomalous reflection is designed and measured. en
dc.format.extent 119 + app, 101
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Aalto University en
dc.publisher Aalto-yliopisto fi
dc.relation.ispartofseries Aalto University publication series DOCTORAL DISSERTATIONS en
dc.relation.ispartofseries 149/2017
dc.relation.haspart [Publication 1]: V.S. Asadchy, I.A. Faniayeu, Y. Ra’di, S.A. Tretyakov. Determining polarizability tensors for an arbitrary small electromagnetic scatterer. Photonics and Nanostructures: Fundamentals and Applications, 12, issue 4, (298–304) (invited paper), August 2014. DOI: 10.1016/j.photonics.2014.04.004
dc.relation.haspart [Publication 2]: M. Albooyeh, V.S. Asadchy, R. Alaee, S.M. Hashemi, M. Yazdi, M.S. Mirmoosa, C. Rockstuhl, C.R. Simovski, and S.A. Tretyakov. Purely bianisotropic scatterers. Physical Review B, 94, issue 24, 245428 (1–7), December 2016. DOI: 10.1103/PhysRevB.94.245428
dc.relation.haspart [Publication 3]: V.S. Asadchy, Y. Ra’di, J. Vehmas, and S.A. Tretyakov. Functional metamirrors using bianisotropic elements. Physical Review Letters, 114, issue 9, 095503 (1–5), March 2015. DOI: 10.1103/PhysRevLett.114.095503
dc.relation.haspart [Publication 4]: V.S. Asadchy, M. Albooyeh, S.A. Tretyakov. Optical metamirror: all-dielectric frequency-selective mirror with fully controllable reflection phase. Journal of the Optical Society of America B, 33, issue 2, (A16–A20) (invited paper), February 2016. DOI: 10.1364/JOSAB.33.000A16
dc.relation.haspart [Publication 5]: V.S. Asadchy, I.A. Faniayeu, Y. Ra’di, S.A. Khakhomov, I.V. Semchenko, and S.A. Tretyakov. Broadband reflectionless metasheets: frequency-selective transmission and perfect absorption. Physical Review X,5, issue 3, 031005 (1–10), July 2015. DOI: 10.1103/PhysRevX.5.031005
dc.relation.haspart [Publication 6]: V.S. Asadchy, M. Albooyeh, S.N. Tcvetkova, A. Díaz-Rubio, Y. Ra’di, and S.A. Tretyakov. Perfect control of reflection and refraction using spatially dispersive metasurfaces. Physical Review B, 94, issue 7, 075142(1–14), August 2016. DOI: 10.1103/PhysRevB.94.075142
dc.relation.haspart [Publication 7]: V.S. Asadchy, A. Wickberg, A. Díaz-Rubio, and M. Wegener. Eliminating scattering loss in anomalously reflecting optical metasurfaces. ACS Photonics, 4, issue 5, 1264–1270, April 2017. DOI: 10.1021/acsphotonics.7b00213
dc.subject.other Electrical engineering en
dc.subject.other Materials science en
dc.title Spatially dispersive metasurfaces en
dc.type G5 Artikkeliväitöskirja fi Sähkötekniikan korkeakoulu fi School of Electrical Engineering en
dc.contributor.department Elektroniikan ja nanotekniikan laitos fi
dc.contributor.department Department of Electronics and Nanoengineering en
dc.subject.keyword spatial dispersion en
dc.subject.keyword metamaterials en
dc.subject.keyword metasurfaces en
dc.subject.keyword bi-anisotropy en
dc.subject.keyword gratings en
dc.identifier.urn URN:ISBN:978-952-60-7558-7
dc.type.dcmitype text en
dc.type.ontasot Doctoral dissertation (article-based) en
dc.type.ontasot Väitöskirja (artikkeli) fi
dc.contributor.supervisor Tretyakov, Sergei, Prof., Aalto University, Department of Electronics and Nanoengineering, Finland
dc.contributor.supervisor Semchenko, Igor, Prof., Francisk Skorina Gomel State University, Belarus
dc.opn Fleury, Romain, Prof., École Polytechnique Fédérale de Lausanne, Switzerland
dc.rev Silveirinha, Mario, Prof., Instituto Superior Técnico, Portugal
dc.rev Sounas, Dimitrios, Dr., The University of Texas at Austin, USA 2017-09-29

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