2014/11/12 by William Yam, Slawek Gras, M. Evans +1 · 2 citations
Engineering · Physics and Astronomy · #Absorption (acoustics) #Acoustics #Advanced Frequency and Time Standards #Coating #Cold Atom Physics and Bose-Einstein Condensates #Composite material #Computer science #Detector #Engineering #Gravitational wave #Interferometry #Materials science #Mechanical and Optical Resonators #Mechanical engineering #Meteorology #Noise (video) #Optical coating #Optics #Physics #Space (punctuation) #Stack (abstract data type) #Thermal #Work (physics) #physics.optics
paper · pdf · doi:10.1103/physrevd.91.042002
published as Phys. Rev. D 91, 042002 (2015) · 6 pages, 4 figures
arxiv created 2014/11/12 · openalex publication_date 2015/02/03 · arxiv updated 2015/03/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The most sensitive measurements of time and space are made with resonant optical cavities, and these measurements are limited by coating thermal noise. The mechanical and optical performance requirements placed on coating materials, especially for interferometric gravitational wave detectors, have proven extremely difficult to meet despite a lengthy search. In this paper we propose a new approach to high performance coatings, the use of multiple materials at different depths in the coating. To support this we generalize previous work on thermal noise in two-material coatings to an arbitrary multimaterial stack, and develop a means of estimating absorption in these multimaterial coatings. This new approach will allow for a broadening of the search for high performance coating materials.