论文标题
与GDFECO的纳米光结构中的等离子二色性和全光磁化切换
Plasmonic dichroism and all-optical magnetization switching in nanophotonic structures with GdFeCo
论文作者
论文摘要
我们报告了在磁性材料中观察到的等离子二色性现象，并在表面等离子体偏振子波的激发下具有横向磁化。该作用源自两个磁化依赖性贡献对物质吸收的相互作用，在等离子体激发下两者都增强了材料吸收。类似于全光螺旋依赖性磁化切换的最近发现的效果，此效果提供了执行确定性磁化切换到所需状态的可能性。我们通过电磁建模显示激光脉冲令人兴奋的反向传播等离子体可用于以确定性的方式编写 +m或-m状态，以独立于初始磁化状态。提出的方法适用于各种铁磁性材料，这些材料表现出热情性质的全光转换现象，并扩大了其在数据存储设备中的应用。
We report on a phenomenon of plasmonic dichroism observed in magnetic materials with the transverse magnetization under the excitation of the surface plasmon polariton waves. The effect originates from the interplay of the two magnetization-dependent contributions to the material absorption, both of which are enhanced under plasmon excitation. Similar to the recently discovered effect of a all-optical helicity-dependent magnetization switching, this effect provides a possibility to perform a deterministic magnetization switching to the desired state. We show by electromagnetic modeling that laser pulses exciting counter-propagating plasmons can be used to write +M or -M state in a deterministic way independent on the initial magnetization state. The presented approach applies to various ferrimagnetic materials exhibiting the phenomenon of all-optical switching of thermal nature and broadens the horizons of their applications in data storage devices.
