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A cascade switching superconducting single photon detector
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View: Figures


Image of FIG. 1.
FIG. 1.

The proposed parallel detector. (a) Electron microscope image of the detector showing the coplanar transmission line used for dc biasing and signal readout, the in series inductor (indicated by the arrow) and the parallel structure (in the box). (b) Enlargement of the five parallel wires structure: each wire is long and wide. (c) Electrical model of the parallel detector used to simulate its response. The gray box represents the detector.

Image of FIG. 2.
FIG. 2.

(Color online) Nonaveraged output voltage pulses from the parallel SSPD (upper curve, red online) and the meandered SSPD (lower curve, blue online), recorded at . The signals are amplified 400 times. In the inset is shown the current-voltage characteristic, recorded at , of the parallel SSPD (upper curve, voltage scale expanded ten times, red online), and of the meandered SSPD (lower curve, blue online).

Image of FIG. 3.
FIG. 3.

Count rates vs dc bias current of the parallel SSPD. Each curve corresponds to different relative laser light intensities (from top to bottom: 1, 0.5, 0.25, 0.1, 0.01, and 0). The inset shows the linear relation between count rate and relative laser light intensities, recorded at , underlining the single photon response.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A cascade switching superconducting single photon detector