8 October 2004 Design techniques for improved noise performance of superconducting transition edge sensor bolometers
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Abstract
We have investigated the noise performance of MoAu-bilayer TES bolometers designed for infrared detectors. A set of devices with variations in geometry were fabricated at the NASA/GSFC detector development facility. These detectors have different bilayer aspect ratios and have varieties of normal metal regions deposited on top of the bilayer to study the effects of geometry on noise. These normal metal regions are oriented either parallel or transverse to the direction of current flow, or both. The lowest noise detectors are found to have normal metal regions oriented transversely. Our detectors with the most favorable design feature negligible excess noise in the in-band region, only slight excess noise in the out-of-band region, and low 1/f noise. The detectors are successfully used in the Submillimeter Broadband Spectrometer FIBRE which is used for astronomical observations at the Caltech Submillimeter Observatory.
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Johannes G. Staguhn, Johannes G. Staguhn, Dominic J. Benford, Dominic J. Benford, James A. Chervenak, James A. Chervenak, S. Harvey Moseley, S. Harvey Moseley, Christine A. Allen, Christine A. Allen, Thomas R. Stevenson, Thomas R. Stevenson, Wen-Ting Hsieh, Wen-Ting Hsieh, } "Design techniques for improved noise performance of superconducting transition edge sensor bolometers", Proc. SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, (8 October 2004); doi: 10.1117/12.552102; https://doi.org/10.1117/12.552102
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