Titania Mixed with Silica: A Low Thermal-Noise Coating Material for Gravitational-Wave Detectors.

Autor: McGhee GI; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland., Spagnuolo V; Maastricht University, Minderbroedersberg 4-6, 6211 LK Maastricht, The Netherlands.; Nikhef, Science Park 105, 1098 XG Amsterdam, The Netherlands., Demos N; Massachusetts Institute of Technology, 185 Albany Street, Cambridge, Massachusetts 02139, USA., Tait SC; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland., Murray PG; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland., Chicoine M; Département de Physique, Université de Montréal, Montréal, Québec, Canada., Dabadie P; Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France., Gras S; Massachusetts Institute of Technology, 185 Albany Street, Cambridge, Massachusetts 02139, USA., Hough J; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland., Iandolo GA; Maastricht University, Minderbroedersberg 4-6, 6211 LK Maastricht, The Netherlands.; Nikhef, Science Park 105, 1098 XG Amsterdam, The Netherlands., Johnston R; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland., Martinez V; Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France., Patane O; Department of Physics, California State University Fullerton, Fullerton, California 92831, USA., Rowan S; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland., Schiettekatte F; Département de Physique, Université de Montréal, Montréal, Québec, Canada., Smith JR; Nicholas and Lee Begovich Center for Gravitational-Wave Physics and Astronomy, California State University, Fullerton, Fullerton, California 92831, USA., Terkowski L; Institut für Laserphysik und Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany., Zhang L; LIGO Laboratory, California Institute of Technology, Pasadena, California 91125, USA., Evans M; Massachusetts Institute of Technology, 185 Albany Street, Cambridge, Massachusetts 02139, USA., Martin IW; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland., Steinlechner J; SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland.; Maastricht University, Minderbroedersberg 4-6, 6211 LK Maastricht, The Netherlands.; Nikhef, Science Park 105, 1098 XG Amsterdam, The Netherlands.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2023 Oct 27; Vol. 131 (17), pp. 171401.
DOI: 10.1103/PhysRevLett.131.171401
Abstrakt: Coating thermal noise is one of the dominant noise sources in current gravitational wave detectors and ultimately limits their ability to observe weaker or more distant astronomical sources. This Letter presents investigations of TiO_{2} mixed with SiO_{2} (TiO_{2}:SiO_{2}) as a coating material. We find that, after heat treatment for 100 h at 850 °C, thermal noise of a highly reflective coating comprising of TiO_{2}:SiO_{2} and SiO_{2} reduces to 76% of the current levels in the Advanced LIGO and Advanced Virgo detectors-with potential for reaching 45%, if we assume the mechanical loss of state-of-the-art SiO_{2} layers. Furthermore, those coatings show low optical absorption of <1  ppm and optical scattering of ≲5  ppm. Notably, we still observe excellent optical and thermal noise performance following crystallization in the coatings. These results show the potential to meet the parameters required for the next upgrades of the Advanced LIGO and Advanced Virgo detectors.
Databáze: MEDLINE