title: Position-Dependent Local Detection Efficiency in a Nanowire Superconducting Single-Photon Detector.
abstract: We probe the local detection efficiency in a nanowire superconducting single-photon detector along the cross-section of the wire with a far subwavelength resolution. We experimentally find a strong variation in the local detection efficiency of the device. We demonstrate that this effect explains previously observed variations in NbN detector efficiency as a function of device geometry.
authors.affiliation: †Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands.
authors.forename: J J
authors.initials: JJ
authors.lastname: Renema
authors.affiliation: †Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands.
authors.forename: Q
authors.initials: Q
authors.lastname: Wang
authors.affiliation: ‡COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: R
authors.initials: R
authors.lastname: Gaudio
authors.affiliation: †Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands.
authors.forename: I
authors.initials: I
authors.lastname: Komen
authors.affiliation: ‡COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: K
authors.initials: K
authors.lastname: op 't Hoog
authors.affiliation: ‡COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: D
authors.initials: D
authors.lastname: Sahin
authors.affiliation: §Physics Institute of the University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
authors.forename: A
authors.initials: A
authors.lastname: Schilling
authors.affiliation: †Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands.
authors.forename: M P
authors.initials: MP
authors.lastname: van Exter
authors.affiliation: ‡COBRA Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: A
authors.initials: A
authors.lastname: Fiore
authors.affiliation: §Physics Institute of the University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.
authors.forename: A
authors.initials: A
authors.lastname: Engel
authors.affiliation: †Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands.
authors.forename: M J A
authors.initials: MJ
authors.lastname: de Dood
keywords: Superconducting single photon detector; nano-optics; nanowire; quantum tomography; superconductivity