掺杂TiO2的单层Ta2O5中低温机械耗散峰的测量
Measurements of a low temperature mechanical dissipation peak in a single layer of Ta2O5 doped with TiO2
摘要：
氧化物涂层中机械耗散引起的热噪声是许多精密测量系统的主要限制，包括光学频率标准、高分辨率光谱学和干涉式重力波探测器。本文给出了离子束溅射掺杂TiO_2的Ta_2 O_5材料在7 K ~ 290 K之间的损耗随温度变化的测量结果，在20 K处有一个损耗峰。分析的峰值提供了第一个证据的源的耗散掺杂Ta 2 O 5涂层，导致热噪声效应的减少的可能性。
英文摘要：
Thermal noise arising from mechanical dissipation in oxide coatings is a major limitation to many precision measurement systems, including optical frequency standards, high resolution optical spectroscopy and interferometric gravity wave detectors. Presented here are measurements of dissipation as a function of temperature between 7 K and 290 K in ion-beam sputtered Ta2O5 doped with TiO2, showing a loss peak at 20 K. Analysis of the peak provides the first evidence of the source of dissipation in doped Ta2O5 coatings, leading to possibilities for the reduction of thermal noise effects.
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