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Q: Fachverband Quantenoptik und Photonik
Q 27: Quantum Optics III
Q 27.2: Vortrag
Mittwoch, 11. März 2020, 11:15–11:30, f342
Characterization and Detector Tomography of Multi-Element Superconducting Single Photon Detectors — •Timon Schapeler1, Johannes Tiedau2, Christine Silberhorn2, and Tim Bartley1 — 1Mesoskopische Quantenoptik, Department Physik, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany — 2Integrierte Quantenoptik, Department Physik, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
Single photon detection is the basis of many applications in quantum optical technology. Increasingly, arrays of superconducting nanowire single-photon detectors (SNSPDs) are used, exploiting their high efficiency, low noise and fast recovery time. We demonstrate one way to characterize the photon statistics arising from four-element SNSPDs in terms of their detection efficiency. By a comparison of experimental data of a commercial four-pixel device and a theoretical model, we were able to account for the individual detection efficiencies of each pixel. Furthermore, we can use the statistics obtained for a multi-element device in response to known input states to perform detector tomography, thereby providing a fully quantum mechanical description of our measurement device.