Multimaterial coatings with reduced thermal noise
Name
PhysRevD.91.042002.pdf
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329.92 KB
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Author(s)
Yam, William
Gras, Slawomir
Evans, Matthew J
Date Issued
February 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Yam, William, Slawek Gras, and Matthew Evans. “Multimaterial Coatings with Reduced Thermal Noise.” Physical Review D 91.4 (2015): 042002-1-042002-6. © 2015 American Physical Society
Version
Final published version
Abstract
The most sensitive measurements of time and space are made with resonant optical cavities, and these measurements are limited by coating thermal noise. The mechanical and optical performance requirements placed on coating materials, especially for interferometric gravitational wave detectors, have proven extremely difficult to meet despite a lengthy search. In this paper we propose a new approach to high performance coatings, the use of multiple materials at different depths in the coating. To support this we generalize previous work on thermal noise in two-material coatings to an arbitrary multimaterial stack, and develop a means of estimating absorption in these multimaterial coatings. This new approach will allow for a broadening of the search for high performance coating materials.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.91.042002
