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首页> 外文期刊>Applied optics >Enhancement of magneto-optical effects in magnetic nanoparticles near gold-dielectric surfaces
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Enhancement of magneto-optical effects in magnetic nanoparticles near gold-dielectric surfaces

机译：金介电表面附近的磁性纳米粒子中磁光效应的增强

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摘要

We report enhanced magneto-optical Kerr rotation in the layer systems of a magnetic granular film coated by uniform gold and dielectric films. The Kerr rotation spectra measured from 1.2 to 5 eV show a peak at about 2.7 eV, not present in either uncoated magnetic particle films. It was shown that the polar magneto-optical Kerr signal is about five times higher than that obtained for CoFe-MgO granular films in similar conditions. The physical nature of the magneto-optical effect enhancement in three layers (magneticoble/dielectric films) is related to the excitation of surface plasmons and their fast propagation on the interface of a complex three-layer structure. The Kerr rotation enhancement corresponds to intrinsic electronic transitions in the CoFe nanogranules due to the spectral overlap of these transitions with propagating surface plasmons.
机译：我们报告了由均匀金和电介质膜覆盖的磁性颗粒膜的层系统中增强的磁光Kerr旋转。从1.2到5 eV测得的Kerr旋转光谱在约2.7 eV处显示一个峰值，这在任何未涂覆的磁性颗粒薄膜中都不存在。结果表明，在类似条件下，极性磁光Kerr信号比CoFe-MgO颗粒薄膜获得的信号高大约五倍。三层（磁性/贵族/介电膜）中磁光效应增强的物理性质与表面等离激元的激发及其在复杂三层结构界面上的快速传播有关。 Kerr旋转增强对应于CoFe纳米颗粒中的固有电子跃迁，这是由于这些跃迁与传播的表面等离子体激元的光谱重叠所致。

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