Timing performance of 30-nm-wide superconducting nanowire avalanche photodetectors
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najafi-1-2012-99-preprint.pdf
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Author(s)
Najafi, Faraz
Marsili, Francesco
Dauler, Eric A.
Molnar, Richard J.
Berggren, Karl K.
Date Issued
April 2012
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Najafi, F., F. Marsili, E. Dauler, R. J. Molnar, and K. K. Berggren. Timing Performance of 30-nm-wide Superconducting Nanowire Avalanche Photodetectors. Applied Physics Letters 100, no. 15 (2012): 152602.
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Author's final manuscript
Abstract
We investigated the timing jitter of superconducting nanowire avalanche photodetectors (SNAPs, also referred to as cascade-switching superconducting single-photon detectors) based on 30-nm-wide nanowires. At bias currents (I[subscript B]) near the switching current, SNAPs showed sub-35-ps FWHM Gaussian jitter similar to standard 100-nm-wide superconducting nanowire single-photon detectors. At lower values of I[subscript B], the instrument response function (IRF) of the detectors became wider, more asymmetric, and shifted to longer time delays. We could reproduce the experimentally observed IRF time-shift in simulations based on an electrothermal model and explain the effect with a simple physical picture.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1063/1.3703588
