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Titania-doped tantala/silica coatings for gravitational-wave detection

Harry, Gregory M, Abernathy, Matthew R, Becerra-Toledo, Andres E, Armandula, Helena, Black, Eric, Dooley, Katherine, Eichenfield, Matt, Nwabugwu, Chinyere, Villar, Akira, Crooks, D R M, Cagnoli, Gianpietro, Hough, Jim, How, Colin R, MacLaren, Ian, Murray, Peter, Reid, Stuart, Rowan, Sheila, Sneddon, Peter H, Fejer, Martin M, Route, Roger, Penn, Steven D, Ganau, Patrick, Mackowski, Jean-Marie, Michel, Christophe, Pinard, Laurent and Remillieux, Alban 2006. Titania-doped tantala/silica coatings for gravitational-wave detection. Classical and Quantum Gravity 24 (2) , pp. 404-415. 10.1088/0264-9381/24/2/008

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Reducing thermal noise from optical coatings is crucial to reaching the required sensitivity in next generation interferometric gravitational-wave detectors. Here we show that adding TiO2 to Ta2O5 in Ta2O5/SiO2 coatings reduces the internal friction and in addition present data confirming it reduces thermal noise. We also show that TiO2-doped Ta2O5/SiO2 coatings are close to satisfying the optical absorption requirements of second generation gravitational-wave detectors.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: IOP Publishing
ISSN: 0264-9381
Last Modified: 05 Feb 2018 11:46

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