Regensburg 2019 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 33: Quantum light sources

HL 33.9: Vortrag

Mittwoch, 3. April 2019, 17:15–17:30, H34

Quantum Metrology of Solid-State Single-Photon Sources using Photon-Number-Resolving Detectors — •Martin von Helversen¹, Jonas Böhm¹, Marco Schmidt¹, Manuel Gschrey¹, Jan-Hindrik Schulze¹, André Strittmatter^1,3, Sven Rodt¹, Jörn Beyer², Tobias Heindel¹, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany — ²Physikalisch Technische Bundesanstalt, Abbestraße 2-12, 10587 Berlin, Germany — ³Institut für Experimentelle Physik, Otto-von-Guericke Universität Magdeburg, PF4120, Magdeburg, Germany

Quantum-light sources based on semiconductor quantum dots (QDs) are promising candidates for applications in quantum photonics and quantum communication. Important emission characteristics of such emitters, namely the single-photon purity and photon indistinguishability, are usually assessed via time-correlated measurements using standard ’click’ detectors in Hanbury-Brown and Twiss (HBT-) or Hong-Ou-Mandel (HOM-) type configurations. In this work, we employ a state-of-the-art photon-number-resolving (PNR) detection system based on superconducting transition-edge sensors (TESs) to directly access the photon-number distribution of deterministically fabricated solid-state single-photon sources. The obtained results reveal excellent quantitative agreement of the degree of indistinguishability obtained with PNR (90 ± 7 %) and standard detectors (90 ± 5 %). Our work demonstates that TES-based detectors are perfectly suitable for the quantum metrology of non-classical light sources.