A new method of probing mechanical losses of coatings at cryogenic temperatures

A new method of probing mechanical losses of coatings at cryogenic temperatures

A new method of probing mechanical losses and comparing the corresponding deposition processes of metallic and dielectric coatings in 1-100 MHz frequency range and cryogenic temperatures is presented. The method is based on the use of extremely high-quality quartz acoustic cavities whose internal lo...

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Bibliographic Details
Main Authors: Galliou, Serge, Deléglise, Samuel, Goryachev, Maxim, Neuhaus, Leonhard, Cagnoli, Gianpietro, Zerkani, Salim, Dolique, Vincent, Vacheret, Xavier, Abbé, Philippe, Pinard, Laurent, Michel, Christophe, Karassouloff, Thibaut, Briant, Tristan, Cohadon, Pierre-François, Heidmann, Antoine, Tobar, Michael E, Bourquin, Roger
Format: Journal Article
Language:English
Published: 25-05-2016
Subjects:
Physics - Instrumentation and Detectors
Physics - Materials Science
Online Access:Get full text
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Summary:A new method of probing mechanical losses and comparing the corresponding deposition processes of metallic and dielectric coatings in 1-100 MHz frequency range and cryogenic temperatures is presented. The method is based on the use of extremely high-quality quartz acoustic cavities whose internal losses are orders of magnitude lower than any available coatings nowadays. The approach is demonstrated for Chromium, Chromium/Gold and a multilayer tantala/silica coatings. The ${\rm Ta}_2{\rm O}_5/{\rm Si}{\rm O}_2$ coating has been found to exhibit a loss angle lower than $1.6\times10^{-5}$ near 30 {\rm MHz} at 4 {\rm K}. The results are compared to the previous measurements.
DOI:10.48550/arxiv.1605.07697