title: Exciton storage in semiconductor self-assembled quantum dots
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.
authors.affiliation: Materials Department, University of California, Santa Barbara, CA 93106, USA.
authors.initials: T
authors.lastname: Lundstrom
authors.initials: W
authors.lastname: Schoenfeld
authors.initials: H
authors.lastname: Lee
authors.initials: PM
authors.lastname: Petroff