Journal
SCIENCE
Volume 290, Issue 5500, Pages 2282-2285Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.290.5500.2282
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Quantum communication relies on the availability of Light pulses with strong quantum correlations among photons. An example of such an optical source is a single-photon pulse with a vanishing probability for detecting two or more photons. Using pulsed laser excitation of a single quantum dot, a single-photon turnstile device that generates a train of single-photon pulses was demonstrated. For a spectrally isolated quantum dot, nearly 100% of the excitation pulses Lead to emission of a single photon, yielding an ideal single-photon source.
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