Low noise single-photon sources are a critical element for quantum technologies. We present a heralded single-photon source with an extremely low level of residual background photons, by implementing low-jitter detectors and electronics and a fast custom-made pulse generator controlling an optical shutter (a LiNbO3 waveguide optical switch) on the output of the source. This source has a second-order autocorrelation g((2))(0) = 0.005(7), and an output noise factor (defined as the ratio of the number of noise photons to total photons at the source output channel) of 0.25(1)%. These are the best performance characteristics reported to date.
An extremely low-noise heralded single-photon source: a breakthrough for quantum technologies / Brida, Giorgio; Degiovanni, IVO PIETRO; Genovese, M.; Piacentini, Fabrizio; Traina, Paolo; Della Frera, A.; Tosi, A.; Bahgat Shehata, A.; Scarcella, C.; Gulinatti, A.; Ghioni, M.; Polyakov, S. V.; Migdall, A.; Giudice, A.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 101:(2012), pp. 221112.221112-221112.221112-4. [10.1063/1.4768288]
An extremely low-noise heralded single-photon source: a breakthrough for quantum technologies
BRIDA, GIORGIO;DEGIOVANNI, IVO PIETRO;M. Genovese;PIACENTINI, FABRIZIO;TRAINA, PAOLO;
2012
Abstract
Low noise single-photon sources are a critical element for quantum technologies. We present a heralded single-photon source with an extremely low level of residual background photons, by implementing low-jitter detectors and electronics and a fast custom-made pulse generator controlling an optical shutter (a LiNbO3 waveguide optical switch) on the output of the source. This source has a second-order autocorrelation g((2))(0) = 0.005(7), and an output noise factor (defined as the ratio of the number of noise photons to total photons at the source output channel) of 0.25(1)%. These are the best performance characteristics reported to date.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
