Light-emitting current of electrically driven single-photon sources

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The time-dependent tunneling current arising from the electron-hole recombination of the exciton state is theoretically studied using the nonequilibrium Green's function technique and the Anderson model with two energy levels. Charge conservation and gauge invariance are satisfied in the tunneling current. Apart from the classical capacitive charging and discharging behavior, tunneling oscillations are superimposed on the tunneling current for applied rectangular pulse voltages.

Original languageEnglish
Article number115311
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number11
StatePublished - 2006


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