Optical and Mechanical Properties of Ion-Beam-Sputtered Mg F 2 Thin Films for Gravitational-Wave Interferometers

M. Granata*, A. Amato, M. Bischi, M. Bazzan, G. Cagnoli, M. Canepa, M. Chicoine, A. Di Michele, G. Favaro, D. Forest, G. M. Guidi, G. Maggioni, F. Martelli, M. Menotta, M. Montani, F. Piergiovanni, F. Schiettekatte

*Corresponding author for this work

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Abstract

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-wave detectors.

Original languageEnglish
Article number034058
Number of pages12
JournalPhysical Review Applied
Volume17
Issue number3
DOIs
Publication statusPublished - 23 Mar 2022
Externally publishedYes

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