Shelly, CD;
See, P;
Romans, EJ;
Casaburi, A;
Ireland, J;
Williams, JM;
Hadfield, RH;
(2017)
Modelling of a Two-Signal SFQ Detection Scheme for the Readout of Superconducting Nanowire Single Photon Detectors.
In:
Proceedings of the 16th International Superconductive Electronics Conference (ISEC).
IEEE: Naples, Italy.
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Abstract
We present a two-signal single flux quantum (SFQ) detection scheme for the purpose of reading out two pixels of a superconducting nanowire single photon detector (SNSPD). The circuit is based on a coincidence buffer element which is able to output a signal when both of its input lines are triggered. The circuit model for the SNSPD element is simulated in SPICE and optimized to match the experimental SNSPD response data. The two-signal detection scheme is simulated using JSIM which allows for the simulation of Josephson junction elements in a circuit. We demonstrate a model of the two-signal circuit operating with two simulated SNSPD pixel inputs and investigate the response of the scheme when a phase shift is applied to one of the inputs. The scheme shows potential as a useful coincidence detector of single photons. We also present preliminary experimental results of nanobridge-based Josephson junctions to be used in the realization of the coincidence detector circuit. Evidence of the nanobridges exhibiting Josephson behavior (SQUID modulation) are presented.
| Type: | Proceedings paper |
|---|---|
| Title: | Modelling of a Two-Signal SFQ Detection Scheme for the Readout of Superconducting Nanowire Single Photon Detectors |
| Event: | 2017 16th International Superconductive Electronics Conference (ISEC) |
| Dates: | 12 June 2017 - 16 June 2017 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/isec.2017.8314235 |
| Publisher version: | http://dx.doi.org/10.1109/isec.2017.8314235 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Voltage measurement, Photonics, Detectors, Josephson junctions, SQUIDs, Integrated circuit modeling, Modulation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10107343 |
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