0000000000796147

AUTHOR

Igor V. Smetanin

showing 3 related works from this author

Effect of quantized conductivity on the anomalous photon emission radiated from atomic-size point contacts

2019

We observe anomalous visible to near-infrared electromagnetic radiation emitted from electrically driven atomic-size point contacts. We show that the number of photons released strongly depends on the quantized conductance steps of the contact. Counter-intuitively, the light intensity features an exponential decay dependence with the injected electrical power. We propose an analytical model for the light emission considering an out-of-equilibrium electron distribution. We treat photon emission as bremsstrahlung process resulting from hot electrons colliding with the metal boundary and a find qualitative accord with the experimental data.

PhotonQC1-999FOS: Physical sciences02 engineering and technologybremsstrahlung01 natural sciences7. Clean energyElectromagnetic radiationelectromigrationMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciences[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]Electrical and Electronic EngineeringExponential decay010306 general physicsPhysicsCondensed Matter - Mesoscale and Nanoscale Physicsquantized conductivityPhysicsBremsstrahlungConductancevisible light emission021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsLight intensityAtomic radiuspoint contactLight emissionAtomic physics0210 nano-technologyOptics (physics.optics)BiotechnologyPhysics - Optics
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Electrostatic Control over Optically Pumped Hot Electrons in Optical Gap Antennas

2020

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 a…

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 electronsBiotechnology
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Spontaneous hot-electron light emission from electron-fed optical antennas

2015

Nanoscale electronics and photonics are among the most promising research areas providing functional nano-components for data transfer and signal processing. By adopting metal-based optical antennas as a disruptive technological vehicle, we demonstrate that these two device-generating technologies can be interfaced to create an electronically-driven self-emitting unit. This nanoscale plasmonic transmitter operates by injecting electrons in a contacted tunneling antenna feedgap. Under certain operating conditions, we show that the antenna enters a highly nonlinear regime in which the energy of the emitted photons exceeds the quantum limit imposed by the applied bias. We propose a model based…

Materials scienceFOS: Physical sciencesBioengineering02 engineering and technologyElectron01 natural sciencesOpticsTunnel junction0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)General Materials ScienceSpontaneous emissionElectronics010306 general physicsComputer Science::Information TheorySignal processingCondensed Matter - Mesoscale and Nanoscale Physicsbusiness.industryMechanical EngineeringGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsOptoelectronicsLight emissionPhotonics0210 nano-technologybusinessPhysics - OpticsData transmissionOptics (physics.optics)
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