TITLE

A superconductor–insulator–normal metal bolometer with microwave readout suitable for large-format arrays

AUTHOR(S)
Schmidt, D. R.; Lehnert, K. W.; Clark, A. M.; Duncan, W. D.; Irwin, K. D.; Miller, N.; Ullom, J. N.
PUB. DATE
January 2005
SOURCE
Applied Physics Letters;1/31/2005, Vol. 86 Issue 5, p053505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We demonstrate high bandwidth and low-noise readout of a superconductor–insulator–normal metal–insulator–superconductor hot-electron bolometer element. We measure a noise equivalent temperature of better than 0.6 μK/Hz1/2 and infer an electrical noise equivalent power of 7×10-17 W/Hz1/2 for a normal-metal volume of 4.5 μm3 at an operating temperature of 270 mK. Using a pulsed bias technique we measure a thermal time constant of 1.2 μs at 270 mK. The microwave readout method we employ is compatible with large-format arrays of 103–105 pixels required by future far-infrared space and ground-based observatories.
ACCESSION #
16345347

 

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