Effect of heat treatment on mechanical dissipation in Ta2O5 coatings

被引：68

作者：

Martin, I. W. ^{[1
]}

Bassiri, R. ^{[1
]}

Nawrodt, R. ^{[1
,2
]}

Fejer, M. M. ^{[3
]}

Gretarsson, A. ^{[4
]}

Gustafson, E. ^{[5
]}

Harry, G. ^{[6
]}

Hough, J. ^{[1
]}

MacLaren, I. ^{[1
]}

Penn, S. ^{[7
]}

Reid, S. ^{[1
]}

Route, R. ^{[3
]}

Rowan, S. ^{[1
]}

Schwarz, C. ^{[2
]}

Seidel, P. ^{[2
]}

Scott, J. ^{[1
]}

Woodcraft, A. L. ^{[8
,9
]}

机构：

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

[2] Univ Jena, Inst Solid State Phys, D-07743 Jena, Germany

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

[4] Embry Riddle Aeronaut Univ, Prescott, AZ 86301 USA

[5] CALTECH, LIGO Lab, Pasadena, CA 91125 USA

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

[7] Hobart & William Smith Coll, Dept Phys, Geneva, NY 14456 USA

[8] Univ Edinburgh, Inst Astron, SUPA, Edinburgh EH9 3HJ, Midlothian, Scotland

[9] UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland

来源：

CLASSICAL AND QUANTUM GRAVITY | 2010年 / 27卷 / 22期

基金：

美国国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

THERMAL NOISE; ULTRASONIC-ABSORPTION; INTERNAL-FRICTION; TEST MASSES; SIO2; FILMS; LIGO;

D O I：

10.1088/0264-9381/27/22/225020

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Thermal noise arising from mechanical dissipation in dielectric reflective coatings is expected to critically limit the sensitivity of precision measurement systems such as high-resolution optical spectroscopy, optical frequency standards and future generations of interferometric gravitational wave detectors. We present measurements of the effect of post-deposition heat treatment on the temperature dependence of the mechanical dissipation in ion-beam sputtered tantalum pentoxide between 11 K and 300 K. We find that the temperature dependence of the dissipation is strongly dependent on the temperature at which the heat treatment was carried out, and we have identified three dissipation peaks occurring at different heat treatment temperatures. At temperatures below 200 K, the magnitude of the loss was found to increase with higher heat treatment temperatures, indicating that heat treatment is a significant factor in determining the level of coating thermal noise.

引用

页数：13

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