论文标题
热噪声和机械损失SIO $ _2 $/ta $ _2 $ o $ _5 $在低温温度下的光学涂料
Thermal noise and mechanical loss of SiO$_2$/Ta$_2$O$_5$ optical coatings at cryogenic temperatures
论文作者
论文摘要
介电镜涂层的机械损失均可用于重力波探测器和空腔稳定的原子钟局部振荡器的基本限制。使用两种方法来确定机械损耗：涂料质量因子的响声测量和涂层热噪声的直接测量。在这里，我们通过在这些温度下的操作参考腔对镜像热噪声进行系统研究。直接测量的热噪声用于提取SIO $ _2 $ _2 $ _2 $ _2 $ o $ $ _5 $涂层的相应机械损失，这与先前报道的值相比。
Mechanical loss of dielectric mirror coatings sets fundamental limits for both gravitational wave detectors and cavity-stabilized optical local oscillators for atomic clocks. Two approaches are used to determine the mechanical loss: ringdown measurements of the coating quality factor and direct measurement of the coating thermal noise. Here we report a systematic study of the mirror thermal noise from room temperature to 4 K by operating reference cavities at these temperatures. The directly measured thermal noise is used to extract the corresponding mechanical loss for SiO$_2$/Ta$_2$O$_5$ coatings, which are compared with previously reported values.
