Position Sensitive Response of a Single-Pixel Large-Area SNSPD
- URL: http://arxiv.org/abs/2006.00126v1
- Date: Fri, 29 May 2020 23:33:11 GMT
- Title: Position Sensitive Response of a Single-Pixel Large-Area SNSPD
- Authors: Claire E. Marvinney, Brian E. Lerner, Alexander A. Puretzky, Aaron J.
Miller, Benjamin J. Lawrie
- Abstract summary: Superconducting nanowire single photon detectors (SNSPDs) are typically used as single-mode-fiber-coupled single-pixel detectors.
Large area detectors are increasingly critical for applications ranging from microscopy to free-space quantum communications.
We explore changes in the rising edge of the readout pulse for large-area SNSPDs as a function of the bias current, optical spot size on the detector, and number of photons per pulse.
- Score: 58.720142291102135
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Superconducting nanowire single photon detectors (SNSPDs) are typically used
as single-mode-fiber-coupled single-pixel detectors, but large area detectors
are increasingly critical for applications ranging from microscopy to
free-space quantum communications. Here, we explore changes in the rising edge
of the readout pulse for large-area SNSPDs as a function of the bias current,
optical spot size on the detector, and number of photons per pulse. We observe
a bimodal distribution of rise times and show that the probability of a slow
rise time increases in the limit of large spot sizes and small photon number.
In the limit of low bias currents, the dark-count readout pulse is most similar
to the combined large spot size and small-photon-number bright-count readout
pulse. These results are consistent with a simple model of traveling microwave
modes excited by single photons incident at varying positions along the length
of the nanowire.
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