Demonstration of longitudinally polarized optical needles

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorTurquet, Léoen_US
dc.contributor.authorZang, Xiaorunen_US
dc.contributor.authorKakko, Joona Pekkoen_US
dc.contributor.authorLipsanen, Harrien_US
dc.contributor.authorBautista, Godofredoen_US
dc.contributor.authorKauranen, Marttien_US
dc.contributor.departmentDepartment of Electronics and Nanoengineeringen
dc.contributor.groupauthorHarri Lipsanen Groupen
dc.contributor.organizationTampere University of Technologyen_US
dc.date.accessioned2018-11-02T08:43:54Z
dc.date.available2018-11-02T08:43:54Z
dc.date.issued2018-10-15en_US
dc.description.abstractLongitudinally polarized optical needles are beams that exhibit ultra-long depth of field, subwavelength transverse confinement, and polarization oriented along the longitudinal direction. Although several techniques have been proposed to generate such needles, their scarce experimental observations have been indirect and incomplete. Here, we demonstrate the creation and full three-dimensional verification of a longitudinally polarized optical needle. This needle is produced by generating a radially polarized Bessel-Gauss beam at the focus of a high numerical aperture microscope objective. Using three-dimensional spatial mapping of second-harmonic generation from a single vertically aligned GaAs nanowire, we directly verify such a longitudinally polarized optical needle's properties, which are formed at the focus. The needle exhibits a dominant polarization, which is oriented along the longitudinal direction, an ultra-long depth of field (30 λ), and high spatial homogeneity. These are in agreement with corresponding focal field calculations that use vector diffraction theory. Our findings open new opportunities for manipulation and utilization of longitudinally polarized optical needles.en
dc.description.versionPeer revieweden
dc.format.extent13
dc.format.extent27572-27584
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationTurquet, L, Zang, X, Kakko, J P, Lipsanen, H, Bautista, G & Kauranen, M 2018, ' Demonstration of longitudinally polarized optical needles ', Optics Express, vol. 26, no. 21, pp. 27572-27584 . https://doi.org/10.1364/OE.26.027572en
dc.identifier.doi10.1364/OE.26.027572en_US
dc.identifier.issn1094-4087
dc.identifier.otherPURE UUID: 42ec00d7-1880-49df-99f8-5a34b91607eeen_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/42ec00d7-1880-49df-99f8-5a34b91607eeen_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85054966008&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/29058208/ELEC_turquet_et_al_demonstration_of_longitudinal_OE.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/34515
dc.identifier.urnURN:NBN:fi:aalto-201811025568
dc.language.isoenen
dc.relation.ispartofseriesOptics Expressen
dc.relation.ispartofseriesVolume 26, issue 21en
dc.rightsopenAccessen
dc.titleDemonstration of longitudinally polarized optical needlesen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion

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