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.

中文翻译：

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大量的低频读出量子电容检测器

量子电容检测器（QCD）是基于单个库珀对盒超导量子位的光子散粒噪声限制的太赫兹检测器。QCD展示了在10 − 20至10 − 18 W之间的负载条件下1.5 THz辐射的光子散粒噪声限制性能，并在该频率下对单光子进行检测和计数。我们在这里报告了QCD的441像素阵列的制造和初步表征，其读出频率在700和850 MHz之间。