Strategies to reduce the thermoelastic loss of multimaterial coated finite substrates

Thermoelastic loss is an important energy dissipation mechanisms in resonant systems. A careful analysis of the thermoelastic critical to design low-noise devices for high-precision applications, such as mirrors used gravitational-wave detectors. In this paper, we present analytical solutions due thermoelasticity between different materials that are contact. We find expressions multimaterial coatings finite substrates, and analyze its dependencies on material properties, mirror operating experimental conditions. Our results show lower temperature, thinner layers higher number interfaces coating, choice first layer coating minimizes thermal expansion mismatch with substrate strategies reduce and, therefore, diminish noise limits resolution sensing applications. The presented paper relevant development detectors other experiments sensitive when