Regensburg 2016 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 19: Transport: Fluctuation and Noise
(Joint session of DY and TT organized by TT)

DY 19.5: Hauptvortrag

Dienstag, 8. März 2016, 15:00–15:30, H23

Dynamical Coulomb Blockade theory of resonantly enhanced light emission from a tunnel junction — •Wolfgang Belzig¹, Fei Xu¹, and Cecilia Holmqvist² — ¹Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany — ²Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway

Inelastic tunneling of electrons generates emission of photons, whose energies intuitively should be 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 characterized by over-bias energies. We have proposed a model of this observation [1] in analogy to the dynamical Coulomb blockade, originally developed for treating the electronic environment in mesoscopic circuits, and explained the experimental finding quantitatively by the correlated tunnelling of two electrons interacting with an LRC circuit modelling the local plasmon-polariton mode. Furthermore, we calculate the over-bias emission at finite temperature and discuss the possibility of non-classical light emission.
F. Xu, C. Holmqvist, W. Belzig, PRL 113, 066801 (2014).