Cross polarization in swept beam THz imaging systems using off-axis parabolic mirrors

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorRezapoor, Pouyanen_US
dc.contributor.authorTamminen, Aleksien_US
dc.contributor.authorNefedova, Irinaen_US
dc.contributor.authorAla-Laurinaho, Juhaen_US
dc.contributor.authorLlombart, Nuriaen_US
dc.contributor.authorRodilla, Helenaen_US
dc.contributor.authorStake, Janen_US
dc.contributor.authorTaylor, Zacharyen_US
dc.contributor.departmentZachary Taylor Groupen_US
dc.contributor.departmentDepartment of Electronics and Nanoengineeringen_US
dc.contributor.departmentDelft University of Technologyen_US
dc.contributor.departmentChalmers University of Technologyen_US
dc.date.accessioned2023-01-25T07:33:43Z
dc.date.available2023-01-25T07:33:43Z
dc.date.issued2022en_US
dc.descriptionPublisher Copyright: © 2022 European Association for Antennas and Propagation.
dc.description.abstractThe optical behavior of a terahertz imaging system employing a train of four identical off-axis parabolic mirrors with oblique incidence angle illumination is investigated in this work. The aperture filling and aberrations of a single off-axis parabolic mirror when illuminated by a Gaussian terahertz beam at its focus point is measured and simulated. The amplitude of E-field in transverse electric (TE) and transverse magnetic (TM) polarizations at target plane reveals a significant cross polarization, even when there is zero cross polarization at the source beam, amplitude of which is ∼ 33% of TE polarization. The investigation of the E-field on the detector plane reveals that this ratio is ∼ 1.5% at the detector plane, and the cross polarized E-field at the target plane is rotated back to co polarization. Although its amplitude is negligible, the TM distribution at detector plane is bimodal and tilted about the optical axis.en
dc.description.versionPeer revieweden
dc.format.extent4
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationRezapoor , P , Tamminen , A , Nefedova , I , Ala-Laurinaho , J , Llombart , N , Rodilla , H , Stake , J & Taylor , Z 2022 , Cross polarization in swept beam THz imaging systems using off-axis parabolic mirrors . in 2022 16th European Conference on Antennas and Propagation, EuCAP 2022 . Proceedings of the European Conference on Antennas and Propagation , IEEE , European Conference on Antennas and Propagation , Madrid , Spain , 27/03/2022 . https://doi.org/10.23919/EuCAP53622.2022.9769500en
dc.identifier.doi10.23919/EuCAP53622.2022.9769500en_US
dc.identifier.isbn9788831299046
dc.identifier.issn2164-3342
dc.identifier.otherPURE UUID: 11574459-aef3-4cda-b771-e6fb0f14241den_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/11574459-aef3-4cda-b771-e6fb0f14241den_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85130603465&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/98300184/EuCAP2022_PouyanRezapoor_Final_v1.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/119136
dc.identifier.urnURN:NBN:fi:aalto-202301251490
dc.language.isoenen
dc.relation.ispartofEuropean Conference on Antennas and Propagationen
dc.relation.ispartofseries2022 16th European Conference on Antennas and Propagation, EuCAP 2022en
dc.relation.ispartofseriesProceedings of the European Conference on Antennas and Propagationen
dc.rightsopenAccessen
dc.subject.keywordoff-axis parabolic mirroren_US
dc.subject.keywordpolarizationen_US
dc.subject.keywordsub-millimeter waveen_US
dc.subject.keywordTHzen_US
dc.titleCross polarization in swept beam THz imaging systems using off-axis parabolic mirrorsen
dc.typeConference article in proceedingsfi
dc.type.versionacceptedVersion
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