Cryogenic Mechanical Loss of GaAs/AlGaAs Crystalline Coatings

Nicholas A. Didio, Steven D. Penn, Satoshi Tanioka +3

Optical coatings with minimal thermal noise are essential for high-precision, laser-based metrology experiments. Substrate-transferred crystalline GaAs/Al${}_{0.92}$Ga${}_{0.08}$As coa…