论文标题
磁性材料的宽带和巨型非年份在亚波长度上
Broadband and giant nonreciprocity at the subwavelength scale in magnetoplasmonic materials
论文作者
论文摘要
我们在具有可比等离子体和回旋频率的磁化等离子（旋转）材料中推出了先前被忽略的波传播状态，这使得可以实现巨大和宽带（非分散性）非偏置响应。我们表明，这种影响是由于一种自然的色散补偿形式，最终源自因果关系原理对旋转等离激元介质的微妙含义，该原理允许存在具有异常模式的异常非单调分散体的低损失频率窗口。这与常规的非触发无源物质形成鲜明对比，该材料的频率衍生物在低损失区域的频率导数总是正面的。这些发现在运行和紧凑性的带宽方面为上非偏置组件铺平了道路，大小的质量降低。作为一个相关的例子，我们认为从理论上证明了在适度的磁性偏差和室温下运行的深层宽大，宽带，THZ隔离器。
We unveil a previously overlooked wave propagation regime in magnetized plasmonic (gyrotropic) materials with comparable plasma and cyclotron frequencies, which enables a giant and broadband (nondispersive) nonreciprocal response. We show that this effect is due to a natural form of dispersion compensation that ultimately originates from the subtle implications of the principle of causality for gyrotropic plasmonic media, which allows the existence of a low-loss frequency window with anomalous nonmonotonic dispersion for the extraordinary mode. This is in stark contrast with conventional nongyrotropic passive materials, for which the frequency derivative of the permittivity dispersion function is always positive in low-loss regions. These findings pave the way for superior nonreciprocal components in terms of bandwidth of operation and compactness, with orders-of-magnitude reductions in size. As a relevant example, we consider indium antimonide (InSb) to theoretically demonstrate a deeply subwavelength, broadband, THz isolator operating under moderate magnetic bias and at room temperature.
