Microlens-aided focusing of linearly and azimuthally polarized laser light

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dc.contributor.author Stafeev, S. S.
dc.contributor.author Nalimov, A. G.
dc.contributor.author Kotlyar, M. V.
dc.contributor.author Gibson, D.
dc.contributor.author Song, S.
dc.contributor.author O'Faolain, Liam
dc.contributor.author Kotlyar, V. V.
dc.date.accessioned 2019-10-28T07:37:50Z
dc.date.available 2019-10-28T07:37:50Z
dc.date.issued 2016-12-15
dc.identifier.citation Stafeev, 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.24.029800 en
dc.identifier.volume 24 en
dc.identifier.issued 26 en
dc.identifier.startpage 29800 en
dc.identifier.endpage 29813 en
dc.identifier.uri http://hdl.handle.net/10468/8897
dc.identifier.doi 10.1364/OE.24.029800 en
dc.description.abstract We 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 elements en
dc.description.sponsorship Russian 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Optical Society of America (OSA) en
dc.relation.uri https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-26-29800
dc.rights © 2016 Optical Society of America en
dc.rights.uri https://creativecommons.org/licenses/by/4.0/. . en
dc.subject Binary optics en
dc.subject Microstructure fabrication en
dc.subject Polarization-selective devices en
dc.subject Polarization en
dc.subject Diffractive lenses en
dc.subject Near-field microscopy en
dc.subject Subwavelength structures en
dc.subject Azimuthally polarized beams en
dc.subject Cylindrical vector beams en
dc.subject Electron beam lithography en
dc.subject Laser beams en
dc.subject Light beams en
dc.subject Polarization control en
dc.title Microlens-aided focusing of linearly and azimuthally polarized laser light en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Liam O’Faolain, Tyndall National Institute, University College Cork, Cork, Ireland. +353-21-490-3000 Email: liam.ofaolain@tyndall.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.contributor.funder Russian Foundation for Basic Research en
dc.contributor.funder Ministry of Education and Science of the Russian Federation en
dc.contributor.funder European Research Council en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Optics Express en
dc.internal.IRISemailaddress liam.ofaolain@tyndall.ie en
dc.relation.project info:eu-repo/grantAgreement/EC/FP7::SP2::ERC/337508/EU/DAtacommunications based on NanophotoniC Resonators/DANCER en
dc.identifier.eissn 1094-4087


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