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29 March 2024
 
  » arxiv » 1504.5393

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Elastic Interferometers as Phononic Filters for Thermal Isolation in Low-Noise Transition Edge Sensors
Djelal Osman ; Stafford Withington ; David J. Goldie ; Dorota M. Glowacka ;
Date 21 Apr 2015
AbstractIn order to achieve low Noise-Equivalent-Powers (NEP < 1 aW Hz$^{-1/2}$) Transition Edge Sensors (TES) require high levels of thermal isolation between the superconducting bilayer and the heat bath. We propose that short micro-machined acoustic interferometers can be used for low-noise thermal isolation, avoiding many of the difficulties inherent in conventional, long- legged TES designs. In this paper, we present a detailed elastic wave model of interferometric phononic legs, and demonstrate the successful fabrication of TESs that are thermally isolated by interferometric structures.
Source arXiv, 1504.5393
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