论文标题
基于与高度各向异性铁膜膜的谐振全丝光栅的矢量磁光磁力计
Vector magneto-optical magnetometer based on the resonant all-dielectric gratings with highly anisotropic iron-garnet films
论文作者
论文摘要
具有高空间分辨率的敏感矢量磁力测定法对于各种实际应用至关重要，例如磁心电图，磁性摄影，爆炸性材料检测等。我们提出了一个基于磁铁膜的磁力计，该磁力仪具有很高的磁各向异性，该磁力仪放置在旋转的外部磁场中。每个测得的磁场空间组件在平面外磁化依赖性中都会产生不同的时间谐波。放置在超薄膜顶部的介电谐振光栅增强了磁光响应的10倍，这使得在垂直于膜方向的空间分辨率上更高10倍。报道的磁光计允许磁场的所有三个空间组件同时测量具有高空间分辨率和敏感性的所有三个空间组件，最高可达100 pt/hz $^{1/2} $。
A sensitive vector magnetometry with high spatial resolution is important for various practical applications, such as magnetocardiography, magnetoencephalography, explosive materials detection and many others. We propose a magnetometer based on the magnetic iron-garnet film possessing a very high magnetic anisotropy, placed in the rotating external magnetic field. Each of the measured magnetic field spatial components produces different temporal harmonics in the out-of-plane magnetization dependence. The dielectric resonant grating placed on the top of an ultrathin film enhanced the magneto-optical response 10 times which makes it possible to achieve 10 times higher spatial resolution in the perpendicular to the film direction. The reported magneto-optical magnetometer allows one to measure simultaneously all three spatial components of the magnetic field with high spatial resolution and sensitivity up to 100 pT/Hz$^{1/2}$.
