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Doubling the far-field resolution in midinfrared microscopy

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Show simple item record Kumbham, Mahendar Daly, Susan O'Dwyer, Kevin Mouras, Rabah Liu, Ning Mani, Aladin Peremans, André Tofail, Syed A.M. Silien, Christophe 2017-11-22T09:48:48Z 2017-11-22T09:48:48Z 2016
dc.description peer-reviewed en_US
dc.description.abstract The spatial resolution in far-field mid-infrared (λ>2.5 μm) microscopy and microspectroscopy remains limited with the full-width at half maximum of the point-spread function ca. λ/1.3; a value that is very poor in comparison to that commonly accessible with visible and near-infrared optics. Hereafter, it is demonstrated however that polymer beads that are centre-to-centre spaced by λ/2.6 can be resolved in the mid-infrared. The more than 2-fold improvement in resolution in the far-field is achieved by exploiting a newly constructed scanning microscope built around a mid-infrared optical parametric oscillator and a central solid-immersion lens, and by enforcing the linear polarization unidirectional resolution enhancement with a novel and robust specimen error minimization based on a particle swarm optimization. The method is demonstrated with specimens immersed in air and in water, and its robustness shown by the analysis of dense and complex self-assembled bead islands. en_US
dc.language.iso eng en_US
dc.publisher Optical Society of America en_US
dc.relation 280804 en_US
dc.relation.ispartofseries Optics Express;24 (21), pp. 24377-24389
dc.rights This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. en_US
dc.subject instrumentation en_US
dc.subject measurement en_US
dc.subject metrology en_US
dc.title Doubling the far-field resolution in midinfrared microscopy en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1364/OE.24.024377
dc.contributor.sponsor ERC en_US
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor IRC en_US
dc.relation.projectid FP7 280804 2012-2015 en_US
dc.relation.projectid 13/TIDA/I2613 en_US
dc.relation.projectid 13/CDA/2221 en_US
dc.relation.projectid GOIPG/58/2013 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2693627

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