Large array of low-frequency readout quantum capacitance detectors

Quantum capacitance detectors (QCDs) are photon shot noise-limited terahertz detectors based on a single Cooper-pair box superconducting qubit. The QCD has demonstrated photon shot noise-limited performance for 1.5 THz radiation under loading conditions between 10(-20) and 10(-18) W and single-photon detection and counting at that frequency. We report here fabrication and preliminary characterization of a 441 pixel array of QCDs with readout frequencies between 700 and 850 MHz. (C) The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License.

Automated summary

Quantum capacitance detectors (QCDs) are terahertz detectors based on single Cooper-pair box superconducting qubit, capable of single-photon detection and counting at 1.5 THz frequency. A 441 pixel array of QCDs has been fabricated and preliminarily characterized in this study.