Journal
NANO LETTERS
Volume 15, Issue 7, Pages 4541-4545Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01103
Keywords
Superconducting single photon detector; nanowire; quantum tomography; nano-optics; superconductivity
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Funding
- Netherlands Organisation for Scientific Research (NWO)
- NanoNextNL, a micro- and nano-technology program of the Dutch Ministry of Economic Affairs, Agriculture and Innovation (ELI)
- Swiss National Science Foundation [200021_146887/1]
- European Commission under Initial Training Network PICQUE [608062]
- Swiss National Science Foundation (SNF) [200021_146887] Funding Source: Swiss National Science Foundation (SNF)
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We probe the local detection efficiency in a nano-wire 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.
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