发表机构
University of Vienna; Institute for Quantum Optics and Quantum Information (IQOQI) Vienna, Austrian Academy of Sciences; Institute of Scientific Instruments of the Czech Academy of Sciences（维也纳大学; 奥地利科学院维也纳量子光学与量子信息研究所; 捷克科学院科学仪器研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一种利用超导磁悬浮悬浮30微克高反射率微镜的方法，通过磁反馈稳定位置，实现高灵敏度位移测量，为微克级精密传感和量子腔光力学提供平台。
AI 中文摘要
我们提出一种利用超导磁悬浮来悬浮总质量为30微克的光学微镜的方法。该微镜形成于硅膜上，涂覆有高反射率介电堆栈，并附着在超导微球上。该物体在低温下稳定悬浮于磁四极场中。对横向运动的磁反馈用于稳定悬浮体在陷阱场内的位置，从而允许使用光学干涉测量法测量悬浮体的轴向位移。该系统在轴向陷阱频率167赫兹附近达到约100皮米/√赫兹的灵敏度。这种方法实现了具有最小耗散和可调振荡频率的独立式镜子，为微克量级的精密传感和量子腔光力学提供了一个平台。
英文摘要
We introduce a method to suspend an optical micromirror, with a total mass of \SI{30}{\micro\gram}, using superconducting magnetic levitation. The micromirror is formed on a silicon membrane, coated with a high-reflectivity dielectric stack and attached to superconducting microspheres. The object is stably levitated inside a magnetic quadrupole field at cryogenic temperatures. Magnetic feedback on the transverse motion is used to stabilize the position of the levitator within the trapping field, allowing to measure the axial displacement of the levitator using optical interferometry. The system reaches a sensitivity of order \SI{100}{\pico\metre/\sqrt{\hertz}} near the axial trap frequency of \SI{167}{Hz}. This approach enables free-standing mirrors with minimal dissipation and tunable oscillation frequencies, offering a platform for precision sensing and quantum cavity optomechanics in the microgram regime.
