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Proceedings Paper

Far-infrared/submillimeter imager-polarimeter using distributed antenna-coupled transition edge sensors
Author(s): Peter K. Day; Henry G. LeDuc; Alexey Goldin; Charles Darren Dowell; Jonas Zmuidzinas
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Paper Abstract

We describe a new concept for a detector for the submillimeter and far infrared that uses a distributed hot-electron transition edge sensor (TES) to collect the power from a focal-plane-filling slot antenna array. Because superconducting transmission lines are lossy at frequencies greater than about 1 Thz, the sensors must directly tap the antenna, and therefore must match the antenna impedance (≫ 30 ohms). Each pixel contains many TESs that are all wired in parallel as a single distributed TES, which results in a low impedance that can match to a multiplexed SQUID readout. These detectors are inherently polarization sensitive, with very low cross-polarization, but can also be easily configured to sum both polarizations for imaging applications. The single polarization version can have a very wide bandwidth of greater than 10:1 with a quantum e±ciency greater than 50%. The dual polarization version is narrow band, but can have a higher quantum e±ciency. The use of electron-phonon decoupling obviates the need for micro-machining, making the focal plane much easier to fabricate than with absorber-coupled, geometrically isolated pixels. An array of these detectors would be suitable for an imager for the Single Aperture Far Infrared (SAFIR) observatory. We consider two near-term applications of this technology, a 32 £ 32 element imaging polarimeter for SOFIA and a 3501m camera for the CSO.

Paper Details

Date Published: 8 October 2004
PDF: 9 pages
Proc. SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, (8 October 2004); doi: 10.1117/12.552440
Show Author Affiliations
Peter K. Day, Jet Propulsion Lab. (United States)
Henry G. LeDuc, Jet Propulsion Lab. (United States)
Alexey Goldin, Jet Propulsion Lab. (United States)
Charles Darren Dowell, Jet Propulsion Lab. (United States)
Jonas Zmuidzinas, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 5498:
Millimeter and Submillimeter Detectors for Astronomy II
Jonas Zmuidzinas; Wayne S. Holland; Stafford Withington, Editor(s)

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