论文标题
欺骗磁性局部表面等离子体的理论超出有效的培养基近似值
Theory of Spoof Magnetic Localized Surface Plasmons Beyond Effective Medium Approximations
论文作者
论文摘要
同质的负渗透率球可以支持磁性局部表面等离子体（MLSP）。通常，负渗透性材料是超材料（MM）结构，具有非常深的次波长空间尺度，基于有效的培养基近似，对于这些应用，其效果可能在近场中有害。我们建议通过分析表明，与MLSP谐振相关并受到近场源激发的电磁空间分布可以通过替换负渗透率的高渗透率SPHERE用具有相同半径相同的高Index Dielectric的电源来准确复制，以克服这一基本限制。考虑到大量的铁电材料在低频率（至GHz）下显示了超高的介电常数和低损坏，我们的欺骗MLSPS理论可能是实现辐射频率和微波区域中高性能亚波磁光子设备的关键工具。
A homogeneous negative permeability sphere can support magnetic localized surface plasmons (MLSPs). Generally, negative permeability materials are metamaterial (MM) structures exhibiting very deep subwavelength spatial scales, whose effects may be detrimental in the near-field for those applications based on effective medium approximations. We suggest to overcome this fundamental limitation by demonstrating analytically that the electromagnetic spatial distribution, associated to a MLSP resonance and excited by a near-field source, can be accurately reproduced outside the sphere by substituting the negative permeability sphere with a homogeneous high-index dielectric one with the same radius. Considering that a large class of ferroelectric materials shows ultra-high dielectric constant and low-losses at low frequency (up to GHz), our spoof MLSPs theory could be a key tool for realizing high performance subwavelength magnetic photonic devices in the radiofrequency and microwave regions.
