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17 February 2003 Transition-edge superconducting antenna-coupled bolometer
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We report test results for a single pixel antenna-coupled bolometric detector. Our device consists of a dual slot microstrip antenna coupled to an Al/Ti/Au voltage-biased transition edge superconducting bolometer (TES). The coupling architecture involves propagating the signal along superconducting microstrip lines and terminating the lines at a normal metal resistor colocated with a TES on a thermally isolated island. The device, which is inherently polarization sensitive, is optimized for 140 GHz band measurements. In the thermal bandwidth of the TES, we measure a noise equivalent power of 2.0 × 10-17 W/√Hz in dark tests that agrees with calculated NEP including only contributions from thermal, Johnson and amplifier noise. We do not measure any excess noise at frequencies between 1 and 200 Hz. We measure a thermal conductance G ~5.5 × 10-11 W/K. We measure a thermal time constant as low as 437μs at 3μV bias when stimulating the TES directly using an LED.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Cynthia L. Hunt, James J. Bock, Peter K. Day, Alexey Goldin, Andrew E. Lange, Henry G. LeDuc, Anastasios Vayonakis, and Jonas Zmuidzinas "Transition-edge superconducting antenna-coupled bolometer", Proc. SPIE 4855, Millimeter and Submillimeter Detectors for Astronomy, (17 February 2003);

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