论文标题
相位调节的腔镁极化子作为精确的磁场探针
Phase-modulated cavity magnon polaritons as a precise magnetic field probe
论文作者
论文摘要
我们根据腔镁极化子的相位调制来描述和操作一种新型的自旋 - 磁铁表。在此方案中，通过它在泵上诱导的边带检测到RF磁场，实验构型允许可忽略不计的泵噪声和高频读数。演示器设置基于与Yttrium Iron Garnet球体混合系统耦合的铜腔，达到了$ 2.0 \，\ Mathrm {pt/\ sqrt {hz}} $的灵敏度，避免了泵的噪声并匹配了理论预防。优化的设置可以在室温下达到约8美元的RF磁场灵敏度{ft/\ sqrt {hz}} $。预计在较低的温度下会有所改善，这使该仪器成为访问次距离极限的少数磁力仪之一。由于其自然应用，最终讨论了微型化和多路复用。
We describe and operate a novel spin-magnetometer based on the phase modulation of cavity magnon polaritons. In this scheme a rf magnetic field is detected through the sidebands it induces on a pump, and the experimental configuration allows for a negligible pump noise and a high frequency readout. The demonstrator setup, based on a copper cavity coupled to an yttrium iron garnet sphere hybrid system, reached a sensitivity of $2.0\,\mathrm{pT/\sqrt{Hz}}$, evading the pump noise and matching the theoretical previsions. An optimized setup can attain a rf magnetic field sensitivity of about $8\,\mathrm{fT/\sqrt{Hz}}$ at room temperature. An orders of magnitude improvement is expected at lower temperatures, making this instrument one of the few magnetometers accessing the sub-fT limit. Due to its natural applications, miniaturization and multiplexing are eventually discussed.
