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Proceedings Paper

Access to long-term optical memories using photon echoes retrieved from electron spins in semiconductor quantum wells
Author(s): S. V. Poltavtsev; L. Langer; I. A. Yugova; M. Salewski; Y. V. Kapitonov; D. R. Yakovlev; G. Karczewski; T. Wojtowicz; I. A. Akimov; M. Bayer
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Paper Abstract

We use spontaneous (two-pulse) and stimulated (three-pulse) photon echoes for studying the coherent evolution of optically excited ensemble of trions which are localized in semiconductor CdTe/CdMgTe quantum well. Application of transverse magnetic field leads to the Larmor precession of the resident electron spins, which shuffles optically induced polarization between optically accessible and inaccessible states. This results in several spectacular phenomena. First, magnetic field induces oscillations of spontaneous photon echo amplitude. Second, in three-pulse excitation scheme, the photon echo decay is extended by several orders of magnitude. In this study, short-lived optical excitation which is created by the first pulse is coherently transferred into a long-lived electron spin state using the second optical pulse. This coherent spin state of electron ensemble persists much longer than any optical excitation in the system, preserving information on initial optical field, which can be retrieved as a photon echo by means of third optical pulse.

Paper Details

Date Published: 26 September 2016
PDF: 9 pages
Proc. SPIE 9931, Spintronics IX, 99311V (26 September 2016); doi: 10.1117/12.2237360
Show Author Affiliations
S. V. Poltavtsev, Technische Univ. Dortmund (Germany)
St. Petersburg State Univ. (Russian Federation)
L. Langer, Technische Univ. Dortmund (Germany)
I. A. Yugova, St. Petersburg State Univ. (Russian Federation)
M. Salewski, Technische Univ. Dortmund (Germany)
Y. V. Kapitonov, St. Petersburg State Univ. (Russian Federation)
D. R. Yakovlev, Technische Univ. Dortmund (Germany)
A. F. Ioffe Physical-Technical Institute (Russian Federation)
G. Karczewski, The Institute of Physics (Poland)
T. Wojtowicz, The Institute of Physics (Poland)
I. A. Akimov, Technische Univ. Dortmund (Germany)
A. F. Ioffe Physical-Technical Institute (Russian Federation)
M. Bayer, Technische Univ. Dortmund (Germany)
A. F. Ioffe Physical-Technical Institute (Russian Federation)

Published in SPIE Proceedings Vol. 9931:
Spintronics IX
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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