Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 58: Poster: Quantum Optics and Photonics III

Q 58.32: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Atrium Informatik

Waveguide-integrated superconducting nanowire single-photon detectors with photon number resolution — •Martin A. Wolff1,2,3, Jonas Schütte1,2, Matthias Häussler1,2,3, and Carsten Schuck1,2,31Physics Institute, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany — 2CeNTech - Center for NanoTechnology, Heisenbergstr. 11, 48149 Münster, Germany — 3MNF - Münster Nanofabrication Facility, Heisenbergstr. 11, 48149 Münster, Germany

Superconducting nanowire single-photon detectors (SNSPDs) have recently developed into the leading detector technology with single-photon sensitivity as they offer efficient counting with high repetition rate, short timing jitter and low dark count rate [1]. The integration of these detectors with wide-band Si3N4 nanophotonics [2] allows for implementing quantum optical experiments both at visible and infrared wavelengths on-chip. However, many multi-photon applications such as linear optical quantum computing (LOQC), quantum emitter characterization, light detection and ranging (LIDAR) would benefit from detectors with photon number resolving (PNR) capabilities. Here we employ a parallel resistor approach [3] to realize PNR superconducting nanowire detectors. We fabricate detectors from niobium nitride (NbN) on Si3N4 waveguides that allow for resolving up to four simultaneously arriving photons at telecommunication wavelength (1550 nm). [1] S. Ferrari et al., Nanophotonics, 7, 1725 (2018), [2] C. Schuck et al., Appl. Phys. Lett., 102, 051101 (2013), [3] F. Mattioli et al., Supercond. Sci. Technol., 28, 104001 (2015)

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