6533b871fe1ef96bd12d24fe
RESEARCH PRODUCT
Spatial Distribution of the Nonlinear Photoluminescence in Au Nanowires
Olivier DemichelG. V. Pavan KumarDeepak SharmaJean-claude WeeberBenoit CluzelAlexandre BouhelierGérard Colas Des FrancsAdrian AgredaRomain HernandezSviatlana Viarbitskayasubject
Materials sciencePhotoluminescenceSpectral signatureSurface plasmonNanowirePhysics::Optics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesMolecular physicsSurface plasmon polaritonAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materials010309 opticsExcited state[PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]0103 physical sciencesFemtosecondEmission spectrumElectrical and Electronic Engineering[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]0210 nano-technologyComputingMilieux_MISCELLANEOUSBiotechnologydescription
When gold nanowires are excited with a tightly focused femtosecond laser a distributed nonlinear photoluminescence (N-PL) develops throughout the entire structure. A complete spaced-resolved analysis of the spectral signature of the nanowire nonlinear response is carried out to understand the origin of the distributed nonlinear response. We discuss various mechanisms to explain the experimental data and unambiguously demonstrate that the spatial and spectral extension of the N-PL in the nanowire are mainly dictated by the propagation of a surface plasmon excited at the pump wavelength. We also present experimental signature of near-field excitation of a broadband continuum of surface plasmons excited locally throughout the N-PL emission spectrum.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-04-02 |