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

Abstract

Reducing thermal noise from optical coatings is crucial to reaching the required sensitivity in next generation interferometric gravitational-waves detectors. Here we show that adding TiO${}_2$ to Ta${}_2$O${}_5$ in Ta${}_2$O${}_5$/SiO${}_2$ coatings reduces the internal friction and in addition present data confirming it reduces thermal noise. We also show that TiO${}_2$-doped Ta${}_2$O${}_5$/SiO${}_2$ coatings are close to satisfying the optical absorption requirements of second generation gravitational-wave detectors.

Cited by in corpus (36)

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• Multi-Material Coatings with Reduced Thermal Noise
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• Thermal noises and noise compensation in high-reflection multilayer coating
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• Audio-band Coating Thermal Noise Measurement for Advanced LIGO with a Multi-mode Optical Resonator
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• Comprehensive study of amorphous metal oxide and Ta${}_2$O${}_5$-based mixed oxide coatings for gravitational-wave detectors
• Optical and mechanical properties of ion-beam-sputtered Nb${}_2$O${}_5$ and TiO${}_2$-Nb${}_2$O${}_5$ thin films for gravitational-wave interferometers
• Material loss angles from direct measurements of broadband thermal noise
• Exploration of co-sputtered Ta${}_2$O${}_5$-ZrO${}_2$ thin films for gravitational-wave detectors
• Substrate-transferred GaAs/AlGaAs crystalline coatings for gravitational-wave detectors: A review of the state of the art
• Ternary Quarter Wavelength Coatings for Gravitational Wave Detector Mirrors: Design Optimization via Exhaustive Search
• Mapping the Optical Absorption of a Substrate-Transferred Crystalline AlGaAs Coating at 1.5um
• Structural and Electronic Properties of Ta2O5 with One Formula Unit
• Optical and mechanical properties of ion-beam-sputtered MgF${}_2$ thin films for gravitational-wave interferometers
• Broadband Measurement of Coating Thermal Noise in Rigid Fabry-Perot Cavities
• Effects of mixing and annealing on the optical and mechanical properties of TiO${}_2$:Ta${}_2$O${}_5$ amorphous coatings
• Numerically modeling Brownian thermal noise in amorphous and crystalline thin coatings
• Perspectives on Beam-Shaping Optimization for Thermal-Noise Reduction in Advanced Gravitational-Wave Interferometric Detectors: Bounds, Profiles, and Critical Parameters
• A High-Finesse Suspended Interferometric Sensor for Macroscopic Quantum Mechanics with Femtometre Sensitivity
• Folding Gravitational-Wave Interferometers
• Tests of cryogenic Fabry-Perot cavity with mirrors on different substrates
• Deep insights into the local structure of amorphous Ta2O5 thin films by X-ray pair distribution function analysis
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• Pass-through Mach-Zehnder topologies for macroscopic quantum measurements
• Thermal Noise Reduction in Ternary Optical Coatings: From Ti::GeO${}_2$-Based Ternary Systems to High Index Materials
• Birefringence of AlGaAs/GaAs Coatings under Above-Band-Gap Illumination, GR Noise and Photo-Optic Transfer Function