论文标题
基于空腔镁polariton的精确磁力测定法
Cavity magnon polariton based precision magnetometry
论文作者
论文摘要
可以通过将磁性材料的电子旋转谐振与微波腔模式耦合来实现光子杂种混合系统。与系统动力学相关的准粒子是腔镁极化子，这是由强耦合镁和光子的混合而产生的。我们说明如何使用这些颗粒以具有显着灵敏度的样品探测样品的磁化，从而设计了合适的自旋 - 磁性计，最终可用于直接评估振荡的磁场。具体而言，将磁性激发转换为电磁激发的腔镁偏振子的能力使得将磁性转化为最先进的电子设备达到的量子限制灵敏度。在这里，我们采用由微波腔和铁磁球组成的杂种系统来实验实现两种类型的新型自旋磁力计。
A photon-magnon hybrid system can be realised by coupling the electron spin resonance of a magnetic material to a microwave cavity mode. The quasiparticles associated with the system dynamics are the cavity magnon polaritons, which arise from the mixing of strongly coupled magnons and photons. We illustrate how these particles can be used to probe the magnetisation of a sample with a remarkable sensitivity, devising suitable spin-magnetometers which ultimately can be used to directly assess oscillating magnetic fields. Specifically, the capability of cavity magnon polaritons of converting magnetic excitations to electromagnetic ones, allows for translating to magnetism the quantum-limited sensitivity reached by state-of-the-art electronics. Here we employ hybrid systems composed of microwave cavities and ferrimagnetic spheres, to experimentally implement two types of novel spin-magnetometers.
