Exciton Storage in Semiconductor Self-Assembled Quantum Dots
Authors:
- 17 December 1999
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 286 (5448) , 2312-2314
Abstract
Storage and retrieval of excitons were demonstrated with semiconductor self-assembled quantum dots (QDs). The optically generated excitons were dissociated and stored as separated electron-hole pairs in coupled QD pairs. A bias voltage restored the excitons, which recombined radiatively to provide a readout optical signal. The localization of the spatially separated electron-hole pair in QDs was responsible for the ultralong storage times, which were on the order of several seconds. The present limits of this optical storage medium are discussed.Keywords
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