Two-photon Rabi oscillations in a single InₓGa₁₋ₓAs/GaAs quantum dot

Titelangaben

Stufler, S. ; Machnikowski, Paweł ; Ester, P. ; Bichler, M. ; Axt, Vollrath Martin ; Kuhn, Tilmann ; Zrenner, A.:
Two-photon Rabi oscillations in a single InₓGa₁₋ₓAs/GaAs quantum dot.
In: Physical Review B. Bd. 73 (2006) Heft 12 . - 125304.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.73.125304

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Abstract

We report on Rabi oscillations of the biexciton in a single InxGa1−xAs∕GaAs quantum dot, induced via a coherent two-photon process. In contrast to single-exciton Rabi oscillations the measured population oscillation is not purely sinusoidal in excitation pulse area. The experimental results are well reproduced by a theoretical calculation that relies only on the pulse shape and biexciton binding energy. Dephasing times of the biexciton are similar to those of the single exciton under the applied measurement conditions reaching up to 220ps.