Correlated evolution of structure and mechanical loss of a sputtered silica film

Granata, Massimo; Coillet, Elodie; Martinez, Valérie; Dolique, Vincent; Amato, Alex; Canepa, Maurizio; Margueritat, Jérémie; Martinet, Christine; Mermet, Alain; Michel, Christophe; Pinard, Laurent; Sassolas, Benoît; Cagnoli, Gianpietro

doi:10.1103/PhysRevMaterials.2.053607

Energy dissipation in amorphous coatings severely affects high-precision optical and quantum transducers. In order to isolate the source of coating loss, we performed an extensive study of Raman scattering and mechanical loss of a thermally treated sputtered silica coating. Our results show that loss is correlated with the population of three-membered rings of Si-O-4 tetrahedral units and support the evidence that thermal treatment reduces the density of metastable states separated by a characteristic energy of about 0.5 eV in favor of an increase of the density of states separated by smaller activation energies.

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Titolo:	Correlated evolution of structure and mechanical loss of a sputtered silica film
Autori:	Granata, Massimo Coillet, Elodie Martinez, Valérie Dolique, Vincent Amato, Alex CANEPA, MAURIZIO Margueritat, Jérémie Martinet, Christine Mermet, Alain Michel, Christophe Pinard, Laurent Sassolas, Benoît Cagnoli, Gianpietro mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2018
Rivista:	PHYSICAL REVIEW MATERIALS
Handle:	http://hdl.handle.net/11567/920225
Appare nelle tipologie:	01.01 - Articolo su rivista

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http://hdl.handle.net/11567/920225

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