Optical performance of an ultra-sensitive horn-coupled transition-edge-sensor bolometer with hemispherical backshort in the far infrared.

  title={Optical performance of an ultra-sensitive horn-coupled transition-edge-sensor bolometer with hemispherical backshort in the far infrared.},
  author={Michael D. Audley and Gert de Lange and Jiansong Gao and Pourya Khosropanah and Richard A. Hijmering and M. L. Ridder and P. D. Mauskopf and Dmitry Morozov and Neil A. Trappe and Stephen Doherty},
  journal={The Review of scientific instruments},
  volume={87 4},
The next generation of far infrared space observatories will require extremely sensitive detectors that can be realized only by combining extremely low intrinsic noise with high optical efficiency. We have measured the broad-band optical response of ultra-sensitive transtion edge sensor (TES) bolometers (NEP≈2aW/Hz) in the 30-60-μm band where radiation is coupled to the detectors with a few-moded conical feedhorn and a hemispherical backshort. We show that these detectors have an optical… 
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