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Proceedings Paper

Development of superconducting transition edge sensors based on electron-phonon decoupling
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Paper Abstract

We have successfully fabricated a superconducting transition edge sensor (TES), bolometer that centers on the use of electron-phonon decoupling (EPD) for thermal isolation. We have selected a design approach that separates the two functions of far-infrared and THz radiative power absorption and temperature measurement, allowing separate optimization of the performance of each element. We have integrated molybdenum/gold (Mo/Au) bilayer TES and ion assisted thermally evaporated (IAE) bismuth (Bi) films as radiation absorber coupled to a low-loss microstripline from niobium (Nb) ground plane to a twin-slot antenna structure. The thermal conductance (G) and the time constant for the different geometry device have been measured. For one such device, the measured G is 1.16×10-10 W/K (± 0.61×10- 10 W/K) at 60 mK, which corresponds to noise equivalent power (NEP) = 1.65×10-18W/ √Hz and time constant of ~5 μs.

Paper Details

Date Published: 15 July 2010
PDF: 7 pages
Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 774120 (15 July 2010); doi: 10.1117/12.856450
Show Author Affiliations
Nikhil Jethava, NASA Goddard Space Flight Ctr. (United States)
Global Science and Technology (United States)
James Chervenak, NASA Goddard Space Flight Ctr. (United States)
Ari-David Brown, NASA Goddard Space Flight Ctr. (United States)
MEI Technologies, Inc. (United States)
Dominic Benford, NASA Goddard Space Flight Ctr. (United States)
Gunther Kletetschka, NASA Goddard Space Flight Ctr. (United States)
Vilem Mikula, NASA Goddard Space Flight Ctr. (United States)
Catholic Univ. of America (United States)
Kongpop U-yen, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 7741:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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