Photon echo transients from an inhomogeneous ensemble of semiconductor quantum dots

S. V. Poltavtsev, M. Salewski, Yu. V. Kapitonov, I. A. Yugova, I. A. Akimov, C. Schneider, M. Kamp, Sven Höfling, D. R. Yakovlev, A. V. Kavokin, M. Bayer

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


An ensemble of quantum dot excitons may be used for coherent information manipulation. Due to the ensemble inhomogeneity any optical information retrieval occurs in form of a photon echo. We show that the inhomogeneity can lead to a significant deviation from the conventional echo timing sequence. Variation of the area of the initial rotation pulse, which generates excitons in a dot subensemble only, reveals this complex picture of photon echo formation. We observe a retarded echo for π/2 pulses, while for 3π/2 the echo is advanced in time as evidenced through monitoring the Rabi oscillations in the time-resolved photon echo amplitude from (In,Ga)As/GaAs self-assembled quantum dot structures and confirmed by detailed calculations.
Original languageEnglish
Article number121304(R)
Number of pages5
JournalPhysical Review. B, Condensed matter and materials physics
Issue number12
Publication statusPublished - 10 Mar 2016


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