6533b861fe1ef96bd12c583e
RESEARCH PRODUCT
Wave-vector analysis of plasmon-assisted distributed nonlinear photoluminescence along Au nanowires
G. V. Pavan KumarJulien BarthesAlexandre BouhelierAdrian AgredaDeepak SharmaDeepak SharmaGérard Colas-des-francssubject
Materials scienceMicroscopePhotoluminescenceNanowireFOS: Physical sciencesPhysics::Optics02 engineering and technology01 natural sciencesMolecular physicslaw.inventionCondensed Matter::Materials Sciencelaw0103 physical sciencesWave vector[NLIN]Nonlinear Sciences [physics][PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]010306 general physicsPlasmonScattering021001 nanoscience & nanotechnologyCondensed Matter::Mesoscopic Systems and Quantum Hall EffectSurface plasmon polariton3. Good healthTransverse plane0210 nano-technologyOptics (physics.optics)Physics - Opticsdescription
We report a quantitative analysis of the wavevector diagram emitted by nonlinear photoluminescence generated by a tightly focused pulsed laser beam and distributed along Au nanowire via the mediation of surface plasmon polaritions. The nonlinear photoluminescence is locally excited at key locations along the nanowire in order to understand the different contributions constituting the emission pattern measured in a conjugate Fourier plane of the microscope. Polarization-resolved measurements reveal that the nanowire preferentially emits nonlinear photoluminescence polarized transverse to the long axis at close to the detection limit wavevectors with a small azimuthal spread in comparison to the signal polarized along the long axis. We utilize finite element method to simulate the observed directional scattering by using localized incoherent sources placed on the nanowire. Simulation results faithfully mimic the directional emission of the nonlinear signal emitted by the different portions of the nanowire.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-09-14 |