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We describe a gated quantum dot device called a single-photon pump that produces single photons on demand through the controlled tunneling of individual electrons and holes. Simulations using an InGaAs/GaAs dot show that two modes of operation are possible, with one mode particularly attractive for quantum cryptography applications because it cannot produce more than one photon per cycle.
Coulomb Blockade, device, GaAs, quantum dot, single photon
Citation
Osborn, K.
and Keller, M.
(2006),
A single-photon pump, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32167
(Accessed October 11, 2025)