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Measurement of thermal noise in multilayer coatings with optimized layer thickness

Villar, Akira E. and Black, Eric D. and DeSalvo, Riccardo and Libbrecht, Kenneth G. and Michel, Christophe and Morgado, Nazario and Pinard, Laurent and Pinto, Innocenzo M. and Pierro, Vincenzo and Galdi, Vincenzo and Principe, Maria and Taurasi, Ilaria (2010) Measurement of thermal noise in multilayer coatings with optimized layer thickness. Physical Review D, 81 (12). Art. No. 122001. ISSN 2470-0010.

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A standard quarter-wavelength multilayer optical coating will produce the highest reflectivity for a given number of coating layers, but in general it will not yield the lowest thermal noise for a prescribed reflectivity. Coatings with the layer thicknesses optimized to minimize thermal noise could be useful in future generation interferometric gravitational wave detectors where coating thermal noise is expected to limit the sensitivity of the instrument. We present the results of direct measurements of the thermal noise of a standard quarter-wavelength coating and a low noise optimized coating. The measurements indicate a reduction in thermal noise in line with modeling predictions.

Item Type:Article
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Libbrecht, Kenneth G.0000-0002-8744-3298
Additional Information:© 2010 The American Physical Society. Received 7 April 2010; published 3 June 2010. This research was supported by the NSF under Cooperative Agreement PHY-0757058 and the Italian National Institute for Nuclear Physics (INFN) under the Committee-V COAT grant).
Funding AgencyGrant Number
Italian National Institute for Nuclear Physics (INFN)Committee-V COAT grant
Issue or Number:12
Classification Code:PACS: 04.80.Nn, 05.40.Ca, 07.60.Ly, 95.55.Ym
Record Number:CaltechAUTHORS:20100624-093803618
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18792
Deposited By: Tony Diaz
Deposited On:09 Jul 2010 21:07
Last Modified:26 Nov 2019 11:15

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