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The Quantum Capacitance Detector: A concept for a pair-breaking radiation detector based on the single Cooper-pair box

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arxiv 0902.4194 v2 pith:OQ475KJP submitted 2009-02-24 cond-mat.mes-hall

M. D. Shaw , J. Bueno , P. Day , C. M. Bradford , P. M. Echternach This is my paper · ORCID
classification cond-mat.mes-hall
keywords detectorradiationcooper-pairfar-infraredmicrowavepair-breakingsinglesub-millimeter
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We present a proposed design for a pair-breaking photodetector for far-infrared and sub-millimeter radiation. Antenna-coupled radiation generates quasiparticles in a superconducting absorber, the density of which are measured using a single Cooper-pair box. Readout is performed using an electromagnetic oscillator or a microwave resonator, which is well suited for frequency multiplexing in large arrays. Theoretical limits to detector sensitivity are discussed and modeled, with predicted sensitivities rivaling transition-edge sensors and microwave kinetic inductance detectors. We anticipate that this detector can be used to address key scientific goals in far-infrared and sub-millimeter astronomy.

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    A dark matter detector platform combining a 60 meV-gap semiconductor (Eu5In2Sb6) with cryogenic HEMT readout and daily modulation analysis is presented, with projected sensitivity to sub-MeV dark matter.

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