Mechanical loss in state-of-the-art amorphous optical coatings
Mechanical loss in state-of-the-art amorphous optical coatings
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DOI：
10.1103/physrevd.93.012007
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发表时间：
2016-01-27
影响因子：
5
通讯作者：
Flaminio, Raffaele
中科院分区：
文献类型：
--
作者：
Granata, Massimo;Saracco, Emeline;Flaminio, Raffaele
我们给出了许多不同的高质量光学薄膜的机械特性的结果，这些薄膜是由离子束溅射的掺钛的钽和二氧化硅制成的，最初是为干涉引力波探测器开发的。我们的数据显示，在多层叠层(如高反射布拉格反射镜)中，测量的涂层耗散系统地高于预期，并与样品中的应力条件相关。这对于目前先进的引力波干涉仪的噪声预算，以及更广泛地说，对于任何涉及热噪声限制的光学腔的实验都具有特别的相关性。
We present the results of mechanical characterizations of many different high-quality optical coatings made of ion-beam-sputtered titania-doped tantala and silica, developed originally for interferometric gravitational-wave detectors. Our data show that in multilayer stacks (like high-reflection Bragg mirrors, for example) the measured coating dissipation is systematically higher than the expectation and is correlated with the stress condition in the sample. This has a particular relevance for the noise budget of current advanced gravitational-wave interferometers, and, more generally, for any experiment involving thermal-noise-limited optical cavities.