Imaging the Hidden Modes of Ultrathin Plasmonic Strip Antennas by Cathodoluminescence

Handle URI:
http://hdl.handle.net/10754/598558
Title:
Imaging the Hidden Modes of Ultrathin Plasmonic Strip Antennas by Cathodoluminescence
Authors:
Barnard, Edward S.; Coenen, Toon; Vesseur, Ernst Jan R.; Polman, Albert; Brongersma, Mark L.
Abstract:
We perform spectrally resolved cathodoluminescence (CL) imaging nanoscopy using a 30 keV electron beam to identify the resonant modes of an ultrathin (20 nm), laterally tapered plasmonic Ag nanostrip antenna. We resolve with deep-subwavelength resolution four antenna resonances (resonance orders m = 2-5) that are ascribed to surface plasmon polariton standing waves that are confined on the strip. We map the local density of states on the strip surface and show that it has contributions from symmetric and antisymmetric surface plasmon polariton modes, each with a very different mode index. This work illustrates the power of CL experiments that can visualize hidden modes that for symmetry reasons have been elusive in optical light scattering experiments. © 2011 American Chemical Society.
Citation:
Barnard ES, Coenen T, Vesseur EJR, Polman A, Brongersma ML (2011) Imaging the Hidden Modes of Ultrathin Plasmonic Strip Antennas by Cathodoluminescence. Nano Lett 11: 4265–4269. Available: http://dx.doi.org/10.1021/nl202256k.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
KAUST Grant Number:
KUS-C1-015-21
Issue Date:
12-Oct-2011
DOI:
10.1021/nl202256k
PubMed ID:
21879729
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
The authors would like to thank Ragip A. Pala for assistance in preparation of the samples used in this work. The Stanford part of this work is supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST). CL experiments were performed at AMOLF and are part of the research program of FOM that is financially supported by NWO. Work at AMOLF is also supported by NanoNextNL, a nanotechnology program of the Dutch Ministry of Economic Affairs. It is also part of the research program “Microscopy and modification of nanostructures with focused electron and ion beams” that is cofinanced by FEI Company.
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Full metadata record

DC FieldValue Language
dc.contributor.authorBarnard, Edward S.en
dc.contributor.authorCoenen, Toonen
dc.contributor.authorVesseur, Ernst Jan R.en
dc.contributor.authorPolman, Alberten
dc.contributor.authorBrongersma, Mark L.en
dc.date.accessioned2016-02-25T13:32:08Zen
dc.date.available2016-02-25T13:32:08Zen
dc.date.issued2011-10-12en
dc.identifier.citationBarnard ES, Coenen T, Vesseur EJR, Polman A, Brongersma ML (2011) Imaging the Hidden Modes of Ultrathin Plasmonic Strip Antennas by Cathodoluminescence. Nano Lett 11: 4265–4269. Available: http://dx.doi.org/10.1021/nl202256k.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.pmid21879729en
dc.identifier.doi10.1021/nl202256ken
dc.identifier.urihttp://hdl.handle.net/10754/598558en
dc.description.abstractWe perform spectrally resolved cathodoluminescence (CL) imaging nanoscopy using a 30 keV electron beam to identify the resonant modes of an ultrathin (20 nm), laterally tapered plasmonic Ag nanostrip antenna. We resolve with deep-subwavelength resolution four antenna resonances (resonance orders m = 2-5) that are ascribed to surface plasmon polariton standing waves that are confined on the strip. We map the local density of states on the strip surface and show that it has contributions from symmetric and antisymmetric surface plasmon polariton modes, each with a very different mode index. This work illustrates the power of CL experiments that can visualize hidden modes that for symmetry reasons have been elusive in optical light scattering experiments. © 2011 American Chemical Society.en
dc.description.sponsorshipThe authors would like to thank Ragip A. Pala for assistance in preparation of the samples used in this work. The Stanford part of this work is supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST). CL experiments were performed at AMOLF and are part of the research program of FOM that is financially supported by NWO. Work at AMOLF is also supported by NanoNextNL, a nanotechnology program of the Dutch Ministry of Economic Affairs. It is also part of the research program “Microscopy and modification of nanostructures with focused electron and ion beams” that is cofinanced by FEI Company.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectantennaen
dc.subjectcathodoluminescenceen
dc.subjectLDOSen
dc.subjectquantum emitteren
dc.subjectSurface plasmon polaritonen
dc.titleImaging the Hidden Modes of Ultrathin Plasmonic Strip Antennas by Cathodoluminescenceen
dc.typeArticleen
dc.identifier.journalNano Lettersen
dc.contributor.institutionGeballe Laboratory for Advanced Materials, Stanford, United Statesen
dc.contributor.institutionFOM Institute for Atomic and Molecular Physics - AMOLF, Amsterdam, Netherlandsen
kaust.grant.numberKUS-C1-015-21en
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)en

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