Fabrizi, F. (2025) Mirror Coatings for new generation Gravitational Wave Detectors. Il nuovo cimento C, 48 (3). pp. 1-6. ISSN 1826-9885
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Abstract
Modern gravitational wave detectors are affected in sensitivity by thermal noise in the coating deposited on the mirror free masses of the interferometer. In the middle region of the frequency band (50-300 Hz), this constitutes the main limitation placed on the detector performance. The research activity on this front is focused on the exploration of new materials, deposition techniques, and post-deposition treatments, in order to minimise mechanical losses, optical absorption and scattering, for both components (high and low refractive index) of the mul tilayer stack constituting the Bragg reflector. Moreover, the possibility of employing cryogenic solutions for next-generation detectors, such as Einstein Telescope, intro duces new requirements concerning the mechanical losses and the understanding of their underlying physical mechanisms, leading to the consideration of crystalline coatings alongside amorphous ones. We report here on the research activities within the Virgo Coating R&D Collaboration, with specific focus on the optimisation of mechanical and thermo-optical properties, and present an overview of the potential candidate materials being subject to investigation, including the specific technical and metrology challenges they raise.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 19 Jun 2025 11:07 |
| Last Modified: | 19 Jun 2025 11:07 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23614 |
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