6533b833fe1ef96bd129ba43
RESEARCH PRODUCT
Effect of quantized conductivity on the anomalous photon emission radiated from atomic-size point contacts
Mickaël BuretGérard Colas Des FrancsAlexandre BouhelierAlexander V. UskovIgor V. Smetaninsubject
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 - Opticsdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-11-13 |