A quantum dot single-photon turnstile device.
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.
Michler
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Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106, USA.
Kiraz
A
A
Becher
C
C
Schoenfeld
W V
WV
Petroff
P M
PM
Zhang
L
L
Hu
E
E
Imamoglu
A
A