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Dynamical Coulomb blockade theory of plasmon-mediated light emission from a tunnel junction
Univ Konstanz, Germany.
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
Univ Konstanz, Germany.
Univ Konstanz, Germany.
2016 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 94, no 24, 245111Article in journal (Refereed) Published
Abstract [en]

Inelastic tunneling of electrons can generate the emission of photons with energies intuitively limited by the applied bias voltage. However, experiments indicate that more complex processes involving the interaction of electrons with plasmon polaritons lead to photon emission with overbias energies. We recently proposed a model of this observation in Phys. Rev. Lett. 113, 066801 (2014), in analogy to the dynamical Coulomb blockade, originally developed for treating the electromagnetic environment in mesoscopic circuits. This model describes the correlated tunneling of two electrons interacting with a local plasmon-polariton mode, represented by a resonant circuit, and shows that the overbias emission is due to the non-Gaussian fluctuations. Here we extend our model to study the overbias emission at finite temperature. We find that the thermal smearing strongly masks the overbias emission. Hence, the detection of the correlated tunneling processes requires temperatures k(B)T much lower than the bias energy eV and the plasmon energy h omega(0), a condition which is fortunately realized experimentally.

Place, publisher, year, edition, pages
2016. Vol. 94, no 24, 245111
National Category
Condensed Matter Physics
Research subject
Physics, Condensed Matter Physics
Identifiers
URN: urn:nbn:se:lnu:diva-59578DOI: 10.1103/PhysRevB.94.245111ISI: 000389503400005OAI: oai:DiVA.org:lnu-59578DiVA: diva2:1061675
Available from: 2017-01-03 Created: 2017-01-03 Last updated: 2017-01-03Bibliographically approved

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Holmqvist, Cecilia
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