Rabi oscillations and photocurrent in quantum-dot tunnelling junctions

Boris Fainberg*, Abraham Nitzan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Motivated by the experiments by Zrenner et al. [Nature 418, 612 (2002)], we study the influence of relaxation processes on converting Rabi oscillations in a strongly biased single-quantum-dot photodiode into deterministic photocurrents. We show that the behavior of a quantum dot with different tunnel rates for electron and holes is qualitatively different from that with the equal tunnel rates: in the latter case the current shows attenuating oscillations with the Rabi frequency. In contrast, for different electrons and holes tunnelling rates, the frequency of these oscillations diminishes, and they disappear beyond a definite asymmetry threshold. We give an analytical solution of the problem and a numerical example showing a different behaviour of the transferred charge in the small at-tenuation limit for equal and different tunnel rates for elec-trons and holes.

Original languageEnglish
Pages (from-to)948-951
Number of pages4
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number5
StatePublished - May 2009


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