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Proceedings Article

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

[+] Author Affiliations
Nikhil Jethava

NASA Goddard Space Flight Ctr. (USA) and Global Science and Technology (USA)

James Chervenak, Dominic Benford, Gunther Kletetschka, Kongpop U-yen

NASA Goddard Space Flight Ctr. (USA)

Ari-David Brown

NASA Goddard Space Flight Ctr. (USA) and MEI Technologies, Inc. (USA)

Vilem Mikula

NASA Goddard Space Flight Ctr. (USA) and Catholic Univ. of America (USA)

Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 774120 (July 15, 2010); doi:10.1117/12.856450
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From Conference Volume 7741

  • Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
  • Wayne S. Holland; Jonas Zmuidzinas
  • San Diego, California, USA | June 27, 2010

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.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Nikhil Jethava ; James Chervenak ; Ari-David Brown ; Dominic Benford ; Gunther Kletetschka, et al.
"Development of superconducting transition edge sensors based on electron-phonon decoupling", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 774120 (July 15, 2010); doi:10.1117/12.856450; http://dx.doi.org/10.1117/12.856450


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