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Atomic Structure of Amorphous Optical Coatings of TiO-doped GeO by Grazing-Incidence Total X-ray Scattering Measurements
K. Prasai, J. Jiang, K. Lee +13
Reducing coating thermal noise in future gravitational-wave detectors requires identifying the atomic motifs that control mechanical loss in amorphous optical coatings. We combine…
Machine Learning Assisted Modeling of Amorphous TiO-Doped GeO for Advanced LIGO Mirror Coatings
Jun Jiang, Rui Zhang, Kiran Prasai +4
The mechanical loss angle of amorphous TiO-doped GeO can be lower than 10, making it a candidate for Laser Interferometer Gravitational-wave Observatory (LIGO) mirro…
Argon bubble formation in tantalum oxide-based films for gravitational wave interferometer mirrors
Rebecca B. Cummings, Riccardo Bassiri, Iain W. Martin +1
The argon content of titanium dioxide doped tantalum pentoxide thin films was quantified in a spatially resolved way using HAADF images and DualEELS. Films annealed at 300$^{\circ}…
Structural evolution of binary oxide nanolaminates with annealing and its impact on room-temperature internal friction
Le Yang, Mariana Fazio, Gabriele Vajente +6
Internal friction in oxide thin films imposes a critical limitation to the sensitivity and stability of ultra-high finesse optical cavities for gravitational wave detectors. Strate…
Medium range structural order in amorphous tantala spatially resolved with changes to atomic structure by thermal annealing
Martin J. Hart, Riccardo Bassiri, Konstantin B. Borisenko +6
Amorphous tantala (a-Ta2O5) is an important technological material that has wide ranging applications in electronics, optics and the biomedical industry. It is used as the high ref…