Microlens-aided focusing of linearly and azimuthally polarized laser light

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dc.contributor.authorStafeev, S. S.
dc.contributor.authorNalimov, A. G.
dc.contributor.authorKotlyar, M. V.
dc.contributor.authorGibson, D.
dc.contributor.authorSong, S.
dc.contributor.authorO'Faolain, Liam
dc.contributor.authorKotlyar, V. V.
dc.contributor.funderRussian Foundation for Basic Researchen
dc.contributor.funderMinistry of Education and Science of the Russian Federationen
dc.contributor.funderEuropean Research Councilen
dc.date.accessioned2019-10-28T07:37:50Z
dc.date.available2019-10-28T07:37:50Z
dc.date.issued2016-12-15
dc.description.abstractWe have investigated a four-sector transmission polarization converter (4-SPC) for a wavelength of 633 nm, that enables the conversion of a linearly polarized incident beam into a mixture of linearly and azimuthally polarized beams. It was numerically shown that by placing a Fresnel zone plate of focal length 532 nm immediately after the 4-SPC, the incident light can be focused into an oblong subwavelength focal spot whose size is smaller than the diffraction limit (with width and breadth, respectively, measuring FWHM = 0.28λ and FWHM = 0.45λ, where λ is the incident wavelength and FWHM stands for full-width at half maximum of the intensity). After passing through the 4-SPC, light propagates in free space over a distance of 300 μm before being focused by a Fresnel zone plate (ZP), resulting in focal spot measuring 0.42λ and 0.81λ. The focal spot was measured by a near-field microscope SNOM, and the transverse E-field component of the focal spot was calculated to be 0.42λ and 0.59λ. This numerical result was verified experimentally, giving a focal spot of smaller and larger size, respectively, measuring 0.46λ and 0.57λ. To our knowledge, this is the first implementation of polarization conversion and subwavelength focusing of light using a pair of transmission micro-optic elementsen
dc.description.sponsorshipRussian Foundation for Basic Research (14-29-07133, 14-07-97039, 15-07-01174,15-47-02492, 15-37-20723, 16-07-00990, 16-47-630483); Ministry of Education and Science of the Russian Federation (NSh-4128.2016.9, MK-9019.2016.2);en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationStafeev, S.S., Nalimov, A.G., Kotlyar, M.V., Gibson, D., Song, S., O’Faolain, L. and Kotlyar, V.V., 2016. Microlens-aided focusing of linearly and azimuthally polarized laser light. Optics express, 24(26), pp. 29800-29813. DOI:10.1364/OE.24.029800en
dc.identifier.doi10.1364/OE.24.029800en
dc.identifier.eissn1094-4087
dc.identifier.endpage29813en
dc.identifier.issued26en
dc.identifier.journaltitleOptics Expressen
dc.identifier.startpage29800en
dc.identifier.urihttps://hdl.handle.net/10468/8897
dc.identifier.volume24en
dc.language.isoenen
dc.publisherOptical Society of America (OSA)en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP2::ERC/337508/EU/DAtacommunications based on NanophotoniC Resonators/DANCERen
dc.relation.urihttps://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-26-29800
dc.rights© 2016 Optical Society of Americaen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/. .en
dc.subjectBinary opticsen
dc.subjectMicrostructure fabricationen
dc.subjectPolarization-selective devicesen
dc.subjectPolarizationen
dc.subjectDiffractive lensesen
dc.subjectNear-field microscopyen
dc.subjectSubwavelength structuresen
dc.subjectAzimuthally polarized beamsen
dc.subjectCylindrical vector beamsen
dc.subjectElectron beam lithographyen
dc.subjectLaser beamsen
dc.subjectLight beamsen
dc.subjectPolarization controlen
dc.titleMicrolens-aided focusing of linearly and azimuthally polarized laser lighten
dc.typeArticle (peer-reviewed)en
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