Acoustically Driven Storage of Light in a Quantum Well

C. Rocke, S. Zimmermann, A. Wixforth, J. P. Kotthaus, G. Böhm, and G. Weimann
Phys. Rev. Lett. 78, 4099 – Published 26 May 1997
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Abstract

The strong piezoelectric fields accompanying a surface acoustic wave on a semiconductor quantum well structure are employed to dissociate optically generated excitons and efficiently trap the created electron hole pairs in the moving lateral potential superlattice of the sound wave. The resulting spatial separation of the photogenerated ambipolar charges leads to an increase of the radiative lifetime by orders of magnitude as compared to the unperturbed excitons. External and deliberate screening of the lateral piezoelectric fields triggers radiative recombination after very long storage times at a remote location on the sample.

  • Received 10 March 1997

DOI:https://doi.org/10.1103/PhysRevLett.78.4099

©1997 American Physical Society

Authors & Affiliations

C. Rocke, S. Zimmermann, A. Wixforth, and J. P. Kotthaus

  • Sektion Physik der LMU, Geschwister-Scholl-Platz 1, D-80539 München, Germany

G. Böhm and G. Weimann

  • Walter-Schottky-Institut der TUM, D-85748 Garching, Germany

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Issue

Vol. 78, Iss. 21 — 26 May 1997

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