Enhancing the performance of superconducting nanowire-based detectors with high-filling factor by using variable thickness
Name
2010.11938.pdf
Description
Submitted version
Size
2 MB
Format
Adobe PDF
Checksum (MD5)
d6e40841e2a6e22ad4685c1a299f879a
Author(s)
Baghdadi, Reza
Schmidt, Ekkehart
Jahani, Saman
Charaev, Ilya
Müller, Michael GW
Colangelo, Marco
Zhu, Di
Ilin, Konstantin
Semenov, Alexej D
Jacob, Zubin
Date Issued
2021
Journal
Superconductor Science and Technology
Publisher
IOP Publishing
Citation
Baghdadi, Reza, Schmidt, Ekkehart, Jahani, Saman, Charaev, Ilya, Müller, Michael GW et al. 2021. "Enhancing the performance of superconducting nanowire-based detectors with high-filling factor by using variable thickness." Superconductor Science and Technology, 34 (3).
Version
Original manuscript
Abstract
© 2021 IOP Publishing Ltd. Current crowding at bends of superconducting nanowire single-photon detector (SNSPD) is one of the main factors limiting the performance of meander-style detectors with large filling factors. In this paper, we propose a new concept to reduce the influence of the current crowding effect, a so-called variable thickness SNSPD, which is composed of two regions with different thicknesses. A larger thickness of bends in comparison to the thickness of straight nanowire sections locally reduces the current density and reduces the suppression of the critical current caused by current crowding. This allows variable thickness SNSPD to have a higher critical current, an improved detection efficiency, and decreased dark count rate in comparison with a standard uniform thickness SNSPD with an identical geometry and film quality.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1361-6668/ABDBA6
