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Q: Fachverband Quantenoptik und Photonik
Q 27: Quantum Optics III
Q 27.1: Vortrag
Mittwoch, 11. März 2020, 11:00–11:15, f342
Waveguide Integrated Superconducting Single-Photon Detector Array for Ultra-Fast Quantum Optics Experiments — •Martin A. Wolff1,2, Fabian Beutel1, Wladick Hartmann1, Matthias Häußler1, Helge Gehring1, Robin Stegmüller1, Nicolai Walter1, Wolfram Pernice1, and Carsten Schuck1 — 1Physics Institute, University of Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany — 2martin.wolff@wwu.de
Superconducting nanowire single-photon detectors (SNSPDs) have developed into a leading sensor technology for ultraviolet to mid-infrared light as they offer efficient photon-counting with high repetition rate, short timing jitter and low dark count rates [1]. The integration of these detectors with wideband transparent Si3N4 nanophotonic waveguides on silicon chips [2] enables novel functionality for quantum optics experiments through circuit configurability and superior sensing performance. Here we present progress towards realizing a massively parallelized system for ultra-fast single-photon detection. Our current chip comprises 16 SNSPDs fabricated from NbTiN thin-films on Si3N4 waveguides showing a fabrication yield of > 90%. We realize efficient interfaces between the detectors on the chip and multiple optical fiber channels as low-loss and broadband out-of-plane couplers produced in 3D direct laser writing [3], therewith significantly widening the application space for waveguide-integrated SNSPDs, e.g. for high-bandwidth quantum key distribution with high system detection efficiency. [1] Nanophotonics, 7, 1725 (2018) [2] Appl. Phys. Lett., 102, 051101 (2013) [3] Opt. Lett. 44, 5089 (2019)