Affiliation:
1. Materials Department, University of California, Santa Barbara, CA 93106, USA.
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.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
271 articles.
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