期刊
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
卷 21, 期 -, 页码 -出版社
UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS
DOI: 10.1590/1980-5373-MR-2017-0863
关键词
LIGO; Internal Friction; Optical Films
资金
- US Office of Naval Research
- NRC Research Associate program of the US National Academies of Science, Engineering, and Medicine
- United States National Science Foundation
- Science and Technology Facilities Council of the United Kingdom
- Max-Planck-Society
- State of Niedersachsen/Germany
- Australian Research Council
- International Science Linkages programme of the Commonwealth of Australia
- Council of Scientific and Industrial Research of India
- Istituto Nazionale di Fisica Nucleare of Italy
- Spanish Ministerio de Economia y Competitividad
- Conselleria d'Economia, Hisenda i Innovacio of the Govern de les Illes Balears
- Royal Society
- Scottish Funding Council
- Scottish Universities Physics Alliance
- National Aeronautics and Space Administration
- OTKA of Hungary
- National Research Foundation of Korea
- Industry Canada
- Province of Ontario through the Ministry of Economic Development and Innovation
- National Science and Engineering Research Council Canada
- Carnegie Trust
- Leverhulme Trust
- David and Lucile Packard Foundation
- Research Corporation
- Alfred P. Sloan Foundation
The direct detection of gravitational waves by ground-based interferometric gravitational wave detectors in recent years has opened a new window of the universe, allowing the astrophysical observations of previously unexplored phenomena, such as the collisions of black holes and neutron stars. However, small thermodynamic fluctuations of the density of the thin films that compose the mirrors used within the gravitational wave detectors, such as the LIGO and Virgo detectors, give rise to noise which limits these instruments at their most sensitive frequencies. This Brownian Thermal Noise can be related to the inherent internal friction of the mirror materials through the fluctuation-dissipation theorem. Therefore, the improved sensitivity of gravitational wave detectors depends, to some extent, upon the development of optical thin films with low internal friction. The past two decades have therefore seen the growth of internal friction experiments undertaken within the gravitational wave detection community. This article attempts to summarize the results of these investigations and to highlight current research directions in order to foster a stronger dialogue with the larger internal friction and mechanical spectroscopy community.
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