论文标题
减少多层涂层有限底物的热弹性损失的策略
Strategies to reduce the thermoelastic loss of multimaterial coated finite substrates
论文作者
论文摘要
热弹性损耗是共振系统中重要的能量耗散机制。对热弹性损耗的仔细分析对于高精度应用的低噪声设备的设计至关重要，例如用于重力波检测器的镜子。在本文中，我们介绍了由于正在接触的不同材料之间的热弹性引起的热弹性损失的分析解决方案。我们发现有限底物多层涂层的热弹性损失的表达式，并分析其对材料特性，镜像设计和操作实验条件的依赖性。我们的结果表明，涂层中较低的操作镜温度，较薄的层和较高数量的接口数，以及最小化与基材的热膨胀不匹配的涂层的第一层是减少热弹性损耗的策略，因此减少了限制传感应用分辨率的热噪声。本文介绍的结果与低噪声重力波检测器的发展有关，以及当接触不同材料时对能量耗散机制敏感的其他实验。
Thermoelastic loss is an important energy dissipation mechanisms in resonant systems. A careful analysis of the thermoelastic loss is critical to the design of low-noise devices for high-precision applications, such as the mirrors used for gravitational-wave detectors. In this paper, we present analytical solutions to the thermoelastic loss due to thermoelasticity between different materials that are in contact. We find expressions for the thermoelastic loss of multimaterial coatings of finite substrates, and analyze its dependencies on material properties, mirror design and operating experimental conditions. Our results show that lower operating mirror temperature, thinner layers and higher number of interfaces in the coating, and the choice of the first layer of the coating that minimizes the thermal expansion mismatch with the substrate are strategies that reduce the thermoelastic loss and, therefore, diminish the thermal noise that limits the resolution in sensing applications. The results presented in this paper are relevant for the development of low-noise gravitational-wave detectors and for other experiments sensitive to energy dissipation mechanisms when different materials are in contact.
