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RESEARCH PRODUCT
Electrostatic Control over Optically Pumped Hot Electrons in Optical Gap Antennas
Alexander V. UskovIgor V. SmetaninAdrian AgredaAlexandre BouhelierSviatlana ViarbitskayaGérard Colas Des Francssubject
Materials scienceMetrics & More Article Recommendations nonlinear photoluminescencesurface charge density02 engineering and technology01 natural sciencesnonlinear plasmonicsElectric field0103 physical sciencesoptical gap antennas[NLIN]Nonlinear Sciences [physics]Electrical and Electronic Engineering[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]010306 general physicsNanoscopic scalebusiness.industryCharge density021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsNonlinear systemOptoelectronicsAntenna (radio)0210 nano-technologybusinessHot electronExcitationhot electronsBiotechnologydescription
International audience; We investigate the influence of a static electric field on the incoherent nonlinear response of an unloaded electrically contacted nanoscale optical gap antenna. Upon excitation by a tightly focused near-infrared femtosecond laser beam, a transient elevated temperature of the electronic distribution results in a broadband emission of nonlinear photoluminescence (N-PL). We demonstrate a modulation of the yield at which driving photons are frequency up-converted by means of an external control of the electronic surface charge density. We show that the electron temperature and consequently the N-PL intensity can be enhanced or reduced depending on the command polarity and the strength of the control static field. A modulation depth larger than 100% is observed for activation voltages of a few volts.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-06-23 |