涂层等离子体棒的双负色散关系
Double Negative Dispersion Relations from Coated Plasmonic Rods
摘要：
利用亚波长周期性的涂覆棒阵列构造了一种具有频率相关双负效应的超材料。显式幂级数的色散关系和相关的布洛赫波解。展开参数是周期晶格的长度尺度与波长的比值。对有限尺寸周期单元的直接数值模拟表明，色散关系的幂级数中的首阶项是超材料色散行为的良好预测因子。
英文摘要：
A metamaterial with frequency dependent double negative effective properties is constructed from a sub-wavelength periodic array of coated rods. Explicit power series are developed for the dispersion relation and associated Bloch wave solutions. The expansion parameter is the ratio of the length scale of the periodic lattice to the wavelength. Direct numerical simulations for finite size period cells show that the leading order term in the power series for the dispersion relation is a good predictor of the dispersive behavior of the metamaterial.
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