Semiconductor-based single-photon sources for quantum radiometry and their metrolgical characterization

 

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H. Georgieva

Semiconductor-based single-photon sources for quantum radiometry and their metrolgical characterization

ISBN: 978-3-95606-652-8   |   Erscheinungsjahr: 2022    |    Auflage: 1
Seitenzahl: 134   |    Einband: Broschur    |    Gewicht: 418 g
Lieferzeit: 2-3 Tage
19,00 €
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This work is dedicated to the realization of efficient single-photon sources, which are necessary for reaching high accuracy and metrological traceability in the field of quantum radiometry. Semiconductor quantum dots have promising properties for metrological applications: a spectral emission bandwidth below 50 pm and a decay time of about 1 ns, allowing fast pulsed operation. The InGaAs quantum dots were metrologically characterized regarding their spectral characteristics, single-photon purity, absolute photon flux and absolute optical power. High efficiency of the self-made confocal setup is obtained by combining high transmission objectives with ultra-narrow bandpass filters for low-loss spectral filtering. The light extraction efficiency of the sample is enhanced by integrating a single quantum dot into a monolithic microlens or micromesa. The highest measured photon flux at the detector was (2.55 ± 0.02) ⋅ 106 s−1, which corresponds to a radiant flux of (545 ± 4) fW. The