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dc.contributor.authorVincenti, M. A.
dc.contributor.authorde Ceglia, D.
dc.contributor.authorRoppo, Vito
dc.contributor.authorScalora, M.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear
dc.date.accessioned2011-11-16T14:18:06Z
dc.date.available2011-11-16T14:18:06Z
dc.date.created2011-01-19
dc.date.issued2011-01-19
dc.identifier.citationVincenti, M. [et al.]. Harmonic generation in metallic, GaAs-filled nanocavities in the enhanced transmission regime at visible and UV wavelengths. "Optics express", 19 Gener 2011, vol. 19, núm. 3, p. 2064-2078.
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/2117/13937
dc.description.abstractWe have conducted a theoretical study of harmonic generation from a silver grating having slits filled with GaAs. By working in the enhanced transmission regime, and by exploiting phase-locking between the pump and its harmonics, we guarantee strong field localization and enhanced harmonic generation under conditions of high absorption at visible and UV wavelengths. Silver is treated using the hydrodynamic model, which includes Coulomb and Lorentz forces, convection, electron gas pressure, plus bulk χ(3) contributions. For GaAs we use nonlinear Lorentz oscillators, with characteristic χ(2) and χ(3) and nonlinear sources that arise from symmetry breaking and Lorentz forces. We find that: (i) electron pressure in the metal contributes to linear and nonlinear processes by shifting/reshaping the band structure; (ii) TE- and TM-polarized harmonics can be generated efficiently; (iii) the χ(2) tensor of GaAs couples TE- and TM-polarized harmonics that create phase-locked pump photons having polarization orthogonal compared to incident pump photons; (iv) Fabry-Perot resonances yield more efficient harmonic generation compared to plasmonic transmission peaks, where most of the light propagates along external metal surfaces with little penetration inside its volume. We predict conversion efficiencies that range from 106 for second harmonic generation to 103 for the third harmonic signal, when pump power is 2GW/cm2.
dc.format.extent15 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Ciències de la visió::Òptica física
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshHarmonic generation and mixing
dc.titleHarmonic generation in metallic, GaAs-filled nanocavities in the enhanced transmission regime at visible and UV wavelengths
dc.typeArticle
dc.subject.lemacHarmònics (Ones elèctriques)
dc.contributor.groupUniversitat Politècnica de Catalunya. DONLL - Dinàmica no Lineal, Òptica no Lineal i Làsers
dc.identifier.doi10.1364/OE.19.002064
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.opticsinfobase.org/abstract.cfm?URI=oe-19-3-2064
dc.rights.accessOpen Access
local.identifier.drac5291128
dc.description.versionPostprint (published version)
local.citation.authorVincenti, M.; de Ceglia, D.; Roppo, V.; Scalora, M.
local.citation.publicationNameOptics express
local.citation.volume19
local.citation.number3
local.citation.startingPage2064
local.citation.endingPage2078


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