Metrological characterization of a commercial single-photon source with high photon flux emission

verfasst von
Hristina Georgieva, Petr Stepanov, Leonora Sewidan, Anton Pishchagin, Marco López, Stefan Kück
Abstract

We present a comprehensive metrological characterization of a commercial single-photon source with high photon flux emission for use in radiometry. The source is based on an InGaAs quantum dot in a micropillar. A comparative analysis of two excitation schemes—phonon-assisted excitation and two-photon excitation—explores differences in excitation power dependence, temporal stability and single-photon purity. The commercial source exhibits excellent properties for the field of quantum radiometry, achieving simultaneously a photon flux of (17.19 ± 0.09) million photons/s for a pulse repetition rate of 79.4 MHz, and a single-photon purity of 98%. Its optical power of (3.68 ± 0.02) pW is directly determined with a traceably calibrated low-noise photodiode. The ability to directly compare the photocurrent in a low-noise photodiode with the count rate at a single-photon avalanche detector allows for a seamless transition between the classical and quantum realizations of optical power. Therefore, we were able to build another bridge between classical and quantum radiometry by using a deterministic single-photon source.

Externe Organisation(en)
Physikalisch-Technische Bundesanstalt (PTB)
Quandela
Typ
Artikel
Journal
METROLOGIA
Band
61
ISSN
0026-1394
Publikationsdatum
23.07.2024
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Allgemeiner Maschinenbau
Elektronische Version(en)
https://doi.org/10.1088/1681-7575/ad615e (Zugang: Offen)