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

Harry, Gregory M. and Abernathy, Matthew R. and Becerra-Toledo, Andres E. and Armandula, Helena and Black, Eric and Dooley, Kate and Eichenfield, Matt and Nwabugwu, Chinyere and Villar, Akira and Crooks, D. R. M. and Cagnoli, Gianpietro and Hough, Jim and How, Colin R. and MacLaren, Ian and Murray, Peter and Reid, Stuart and Rowan, Sheila and Sneddon, Peter H. and Fejer, Martin M. and Route, Roger and Penn, Steven D. and Ganau, Patrick and Mackowski, Jean-Marie and Michel, Chrisophe and Pinard, Laurent and Remillieux, Alban (2007) Titania-doped tantala/silica coatings for gravitational-wave detection. Classical and Quantum Gravity, 24 (2). pp. 405-415. ISSN 0264-9381. doi: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.

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Fejer, Martin M.0000-0002-5512-1905
Additional Information:Copyright © Institute of Physics and IOP Publishing Limited 2007. Received 21 September 2006, in final form 20 November 2006. Published 8 December 2006. Print publication: Issue 2 (21 January 2007) The LIGO Observatories were constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation under cooperative agreement PHY-9210038. The LIGO Laboratory operates under cooperative agreement PHY-0107417. We thank Zhigang Pan and Slawomir Gras for checking the thermal noise formulae. We also gratefully acknowledge funding from NSF grant PHY-0355118(HWS). This paper has been assigned LIGO Document Number LIGOP050048-00-R.
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ID Code:7068
Deposited By: Archive Administrator
Deposited On:08 Jan 2007
Last Modified:12 Jul 2022 19:51

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