Real time quasiparticle tunneling measurements on an illuminated quantum capacitance detector
- 25 June 2012
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 100 (26), 263509
- https://doi.org/10.1063/1.4731880
Abstract
Quasiparticle tunneling events are measured in real time using a quantum capacitance detector (QCD), allowing for the extraction of tunneling rates as a function of temperature and optical loading of radiation coming from a black body source filtered to 200 m. The measurements are used to corroborate the basic operating principles of the QCD. An estimate of the residual quasiparticle density is made, and the noise equivalent power (NEP) is assessed to be 7.2×10−20W/Hz1/2 at the lowest signal power of 9.2×10−20W. This NEP was higher than the photon noise by only a factor of 7 over a wide signal power range.Keywords
This publication has 19 references indexed in Scilit:
- Number Fluctuations of Sparse Quasiparticles in a SuperconductorPhysical Review Letters, 2011
- Quantum capacitance detector: A pair-breaking radiation detector based on the single Cooper-pair boxPhysical Review B, 2009
- Ultrasensitive hot-electron nanobolometers for terahertz astrophysicsNature Nanotechnology, 2008
- Kinetics of nonequilibrium quasiparticle tunneling in superconducting charge qubitsPhysical Review B, 2008
- Kinetics of quasiparticle trapping in a Cooper-pair boxPhysical Review B, 2007
- Poisson Transition Rates from Time-Domain Measurements with a Finite BandwidthPhysical Review Letters, 2006
- Nonequilibrium Quasiparticles andPeriodicity in Single-Cooper-Pair TransistorsPhysical Review Letters, 2004
- A broadband superconducting detector suitable for use in large arraysNature, 2003
- Review of black surfaces for space-borne infrared systemsReview of Scientific Instruments, 1999
- Double-slot antennas on extended hemispherical and elliptical silicon dielectric lensesIEEE Transactions on Microwave Theory and Techniques, 1993