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dc.creatorScarpettini, Alberto
dc.creatorBragas, Andrea Veronica
dc.date.accessioned2019-06-28T18:46:36Z
dc.date.available2019-06-28T18:46:36Z
dc.date.issued2015-01
dc.identifier.citationHarmonic demodulation and minimum enhancement factors in field-enhanced near-field optical microscopy; Wiley Blackwell Publishing, Inc; Journal Of Microscopy-oxford; 257; 1-2015; 54-64 Scarpettini, Alberto Franco; Bragas, Andrea Veronicaes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12272/3752
dc.description.abstractField enhanced scanning optical microscopy (FESOM) relies on the design and fabrication of plasmonic probes which had to provide optical and chemical contrast at the nanoscale. In order to do so, the scattering containing the near field information recorded in a FESOM experiment, has to surpass the background light, always present due multiple interferences between the macroscopic probe and sample. In this work, we show that when the probe-sample distance is modulated with very low amplitude, the higher the harmonic demodulation is, the better the ratio between the near field signal and the interferometric background results. The choice of working at a given n harmonic is dictated by the experiment when the signal at the n+1 harmonic goes below the experimental noise. We demonstrate that the optical contrast comes from the nth-derivative of the near field scattering, amplified by the interferometric background. By modeling the far and near field we calculate the probe-sample approach curves, which fit very well the experimental ones. After taking a great amount of experimental data for different probes and samples, we conclude with a table of the minimum enhancement factors needed to have optical contrast with FESOM.es_ES
dc.formatapplication/pdfes_ES
dc.language.isoenges_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectUTNes_ES
dc.subjectFRDes_ES
dc.subjectFESOMes_ES
dc.subjectscanning optical microscopyes_ES
dc.subjectPlasmonices_ES
dc.subjectharmonic demodulationes_ES
dc.titleHarmonic demodulation and minimum enhancement factors in field-enhanced near-field optical microscopyes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.holderScarpettini, Albertoes_ES
dc.description.affiliationFil: Universidad Tecnológica Nacional. Facultad Regional Deltaes_ES
dc.description.peerreviewedPeer Reviewedes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dc.type.snrdinfo:ar-repo/semantics/artículoes_ES
dc.rights.useAtribución (by)Sces_ES
dc.rights.useAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.identifier.doi10.1111/jmi.12185


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