Photon echo transients from an inhomogeneous ensemble of semiconductor quantum dots
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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.
Poltavtsev , S V , Salewski , M , Kapitonov , Y V , Yugova , I A , Akimov , I A , Schneider , C , Kamp , M , Höfling , S , Yakovlev , D R , Kavokin , A V & Bayer , M 2016 , ' Photon echo transients from an inhomogeneous ensemble of semiconductor quantum dots ' Physical Review. B, Condensed matter and materials physics , vol 93 , no. 12 , 121304(R) . DOI: 10.1103/PhysRevB.93.121304
Physical Review. B, Condensed matter and materials physics
© 2016 American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1103/PhysRevB.00.001300
We acknowledge the financial support by the Deutsche Forschungsgemeinschaft, Project ICRC TRR 160 and the Russian Foundation of Basic Research (RFBR) in the frame of the Project No. 15-52-12016 NNIO_a. The project SPANGL4Q acknowledges financial support from the Future and Emerging Technologies (FET) programme within the Seventh Framework Programme for Research of the European Commission, under FET-Open Grant No. FP7-284743. S.V.P. thanks the RFBR for partial financial support (Project No. 14-02-31735 mol_a). S.V.P. and I.A.Yu. acknowledge partial financial support from the Ministry of Education and Science of the Russian Federation (Grant No. 11.G34.31.0067) and St-Petersburg State University (SPbU) (Grant No. 220.127.116.114). M.B. acknowledges support from the Ministry of Education and Science of the Russian Federation (Grant No. 14.Z50.31.0021).