Improvements of readout signal integrity in mid-infrared superconducting nanowire single-photon detectors
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162604_1_5.0202626.pdf
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Published version
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1.19 MB
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Author(s)
Patel, Sahil R
Colangelo, Marco
Beyer, Andrew D
Taylor, Gregor G
Allmaras, Jason P
Bumble, Bruce
Wollman, Emma E
Shaw, Matthew D
Berggren, Karl K
Korzh, Boris
Date Issued
April 17, 2024
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Sahil R. Patel, Marco Colangelo, Andrew D. Beyer, Gregor G. Taylor, Jason P. Allmaras, Bruce Bumble, Emma E. Wollman, Matthew D. Shaw, Karl K. Berggren, Boris Korzh; Improvements of readout signal integrity in mid-infrared superconducting nanowire single-photon detectors. Appl. Phys. Lett. 15 April 2024; 124 (16): 162604.
Version
Final published version
Abstract
Superconducting nanowire single-photon detectors (SNSPDs) in the mid-infrared (MIR) have the potential to open up numerous opportunities in fields such as exoplanet searches, direct dark matter detection, physical chemistry, and remote sensing. One challenge in pushing SNSPD sensitivity to the MIR is a decrease in the signal-to-noise ratio (SNR) of the readout signal, as the critical currents become increasingly smaller. We overcome this trade-off with a device architecture that employs impedance matching tapers and superconducting nanowire avalanche photodetectors to demonstrate increased SNR while maintaining saturated internal detection efficiency at 7.4 μm and approaching saturation at 10.6 μm. This work provides a platform for pushing SNSPD sensitivity to longer wavelengths while enabling the scalability to large arrays.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1063/5.0202626
