High-Reflection Coatings for Gravitational-Wave Detectors: State of The Art and Future Developments

Abstract

We report on the optical, mechanical and structural characterization of the sputtered coating materials of Advanced LIGO, Advanced Virgo and KAGRA gravitational-waves detectors. We present the latest results of our research program aiming at decreasing coating thermal noise through doping, optimization of deposition parameters and post-deposition annealing. Finally, we propose sputtered Si3N4 as a candidate material for the mirrors of future detectors.

References in corpus (6)

• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Characterization of the LIGO detectors during their sixth science run
• Interferometer design of the KAGRA gravitational wave detector
• Mechanical loss in state-of-the-art amorphous optical coatings
• Measurements of mechanical thermal noise and energy dissipation in optical dielectric coatings
• Correlated evolution of structure and mechanical loss of a sputtered silica film

Cited by in corpus (12)

• Amorphous optical coatings of present gravitational-wave interferometers
• Low mechanical loss TiO${}_2$:GeO${}_2$ coatings for reduced thermal noise in Gravitational Wave Interferometers
• Progress in the measurement and reduction of thermal noise in optical coatings for gravitational-wave detectors
• Observation of a Correlation Between Internal friction and Urbach Energy in Amorphous Oxides Thin Films
• Direct Measurement of Coating Thermal Noise in Optical Resonators
• Correlated evolution of structure and mechanical loss of a sputtered silica film
• Exploration of co-sputtered Ta${}_2$O${}_5$-ZrO${}_2$ thin films for gravitational-wave detectors
• Thermal noise and mechanical loss of SiO${}_2$/Ta${}_2$O${}_5$ optical coatings at cryogenic temperatures
• A method for the experimental measurement of bulk and shear loss angles in amorphous thin films
• Measurements of Optical Scatter Versus Annealing Temperature for Amorphous Ta2O5 and TiO2:Ta2O5 Thin Films
• Physical limits of ultra-high-finesse optical cavities: Taming two-level systems of glassy metal oxides
• A Systematic Error in the Internal Friction Measurement of Coatings for Gravitational Waves Detectors