Mechanical loss in tantala/silica dielectric mirror coatings

被引：128

作者：

Penn, SD

Sneddon, PH

Armandula, H

Betzwieser, JC

Cagnoli, G

Camp, J

Crooks, DRM

Fejer, MM

Gretarsson, AM

Harry, GM

Hough, J

Kittelberger, SE

Mortonson, MJ

Route, R

Rowan, S

Vassiliou, CC

机构：

[1] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA

[2] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[3] CALTECH, LIGO Lab, Pasadena, CA 91025 USA

[4] MIT, LIGO Lab, Cambridge, MA 02139 USA

[5] Stanford Univ, Edward L Ginzton Lab, Stanford, CA 94305 USA

来源：

CLASSICAL AND QUANTUM GRAVITY | 2003年 / 20卷 / 13期

关键词：

D O I：

10.1088/0264-9381/20/13/334

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：2917 / 2928

页数：12

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