Optical and mechanical properties of ion-beam-sputtered MgF$_2$ thin films for gravitational-wave interferometers

  title={Optical and mechanical properties of ion-beam-sputtered MgF\$\_2\$ thin films for gravitational-wave interferometers},
  author={Massimo Granata and A. Amato and M. Bischi and Marco Bazzan and Gianpietro Cagnoli and Marco Canepa and Martin Chicoine and Antonio Di Michele and G. Favaro and D. Forest and G. Guidi and Gianluigi Maggioni and F. Martelli and Michele Menotta and M. Montani and Francesco Piergiovanni and François Schiettekatte},
Brownian thermal noise associated with highly reflective coatings is a fundamental limit for several precision experiments, including gravitational-wave detectors. Research is currently ongoing to find coatings with low thermal noise that also fulfill strict optical requirements such as low absorption and scatter. We report on the optical and mechanical properties of ion-beam-sputtered magnesium fluoride thin films, and we discuss the application of such coatings in current and future gravitational… 



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