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yexuqing新虫 (文学泰斗)
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Levitated sensor for magnetometry in ambient environment
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Levitated sensor for magnetometry in ambient environment 磁悬浮传感器助力环境条件下的磁力测量 ▲ 作者：Wei Ji, Changhao Xu, Guofeng Qu and Dmitry Budker ▲链接： https://www.science.org/doi/10.1126/science.adx1707 ▲摘要： 悬浮粒子系统作为一种快速发展的精密传感平台，因其消除机械接触及相关噪声、提供低损耗和高隔离环境而受到广泛关注。当前室温悬浮技术主要对加速度敏感，将其与高灵敏度磁传感进行集成仍颇具挑战。 研究组展示了一种抗磁稳定的磁悬浮磁强计，通过光学方式检测悬浮磁体的运动。最终实现了32飞特斯拉每平方根赫兹（32 fT/√Hz）的灵敏度，足以满足生物学、化学和基础物理学领域的广泛应用需求，其性能可与超导量子干涉器件和原子磁强计相媲美，同时具备可在室温及地磁场环境下工作的优势。 ▲ Abstract： Levitated particle systems have gained attention as a rapidly advancing platform for precision sensing, offering low-loss, highly isolated environments by eliminating mechanical contact and associated noise. Current room-temperature levitation techniques are primarily sensitive to acceleration, and it remains challenging to integrate them with high-sensitivity magnetic sensing. In this work, we demonstrate a diamagnetically stabilized magnetically levitated magnet magnetometer, where the motion of the magnet is detected optically. We achieved a sensitivity of 32 femtoteslas per square root of Hertz, which is adequate for a wide range of applications in biology, chemistry, and fundamental physics, matching the performance of superconducting quantum interference devices and atomic magnetometers, while offering the advantage of operating at room temperature and under Earth’s magnetic field. |
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