Description:  Quantum dots embedded in this disk emit light when hit with a laser. Researchers can filter out all but the last photon in order to reliably produce just one photon per laser pulse.
Source:  Peter Allen, University of California at Santa Barbara
Story:  Security comes one photon at a time
TRN January 3, 2001
TRN Categories:  Semiconductors and Materials; Quantum Computing; Cryptography and Security
Form:  Still

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