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arXiv · 1504.05393

Elastic Interferometers as Phononic Filters for Thermal Isolation in Low-Noise Transition Edge Sensors

Djelal Osman·Stafford Withington·David J. Goldie·Dorota M. Glowacka
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Abstract

In 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.

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Djelal Osman, Stafford Withington, David J. Goldie, Dorota M. Glowacka. 2015-04-21. Elastic Interferometers as Phononic Filters for Thermal Isolation in Low-Noise Transition Edge Sensors. https://arxiv.org/abs/1504.05393

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