Direct Observation of Broadband Coating Thermal Noise in a Suspended   Interferometer
  We have directly observed broadband thermal noise in silica/tantala coatings in a high-sensitivity Fabry-Perot interferometer. Our result agrees well with the prediction based on indirect, ring-down measurements of coating mechanical loss, validating that method as a tool for the development of advanced interferometric gravitational-wave detectors. 
Eric D. Black, Akira Villar, Kyle Barbary, Adam Bushmaker, Jay   Heefner, Seiji Kawamura, Fumiko Kawazoe, Luca Matone, Sharo...