Silica thin films show 6% out-of-plane elastic anisotropy removable by 900°C annealing, measured via Brillouin scattering and confirmed by IR reflectivity, with implications for thermal noise models.
Akutsu et al., Overview of KAGRA: Detector design and construction history, Progress of Theoretical and Ex- perimental Physics 2021, 05A101 (2020)
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Elastic and structural anisotropy in silica thin films for gravitational-wave detectors
Silica thin films show 6% out-of-plane elastic anisotropy removable by 900°C annealing, measured via Brillouin scattering and confirmed by IR reflectivity, with implications for thermal noise models.