Mechanical loss in tantala/silica dielectric mirror coatings
By S. Penn, P. Sneddon, H. Armandula, J. Betzwieser, G. Cagnoli, Jordan B. Camp, D. Crooks, M. Fejer, A. Gretarsson, Gregory M. Harry and 6 more. 2003
154 citations recorded by the source corpus.
Current interferometric gravitational wave detectors use test masses with mirror coatings formed from multiple layers of dielectric materials, most commonly alternating layers of SiO2 (silica) and Ta2O5 (tantala). However, mechanical loss in the Ta2O5/SiO2 coatings may limit the design sensitivity for advanced detectors. We have investigated sources of mechanical loss in the Ta2O5/SiO2 coatings, including loss associated with the coating–substrate interface, with the coating–layer interfaces and with the coating materials. Our results indicate that the loss is associated with the coating materials and that the loss of Ta2O5 is substantially larger than that of SiO2.
Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Ocean Engineering
View Paper: https://www.semanticscholar.org/paper/ccd0f52d04cb72299554412b37d7b944eb49ea29
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Citations in the corpus
- Gravitational Radiation Detection with Laser Interferometry (2013, background): “…this loss on type of material, number of layers, and layer structure have been studied extensively (Bassiri et al. , 2012; Braginsky and Vyatchanin, 2003; Evans et al. , 2012; Flaminio et al. , 2010; Harry et al. , 2007, 2006, 2002; Hong et al. , 2012; Kondratiev et al. , 2011; Penn et al. , 2003).”
- Titania-doped tantala/silica coatings for gravitational-wave detection (2006, background): “When it was determined that the loss was enough to cause limiting noise in next generation gravitationalwave detectors, research was carried out to determine the source of the mechanical loss in SiO2/Ta2O5 coatings [16].”