Vortex-like surface wave and its role in the transient phenomena of meta-material focusing
Vortex-like surface wave and its role in the transient phenomena of meta-material focusing
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DOI：
10.1063/1.1879104
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发表时间：
2004-07
影响因子：
4
通讯作者：
Lei Zhou;C. T. Chan
中科院分区：
文献类型：
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作者：
Lei Zhou;C. T. Chan
我们证明了一个超材料板（e=μ=−1+iΔ）具有一个没有能量传输能力的涡旋状表面波，其性质与局域模或驻波完全不同。通过严格的时间依赖的绿色的函数方法的基础上的计算，我们证明了这样的模式不可避免地产生特征图像振荡，即使是在二维聚焦单色源，这是在许多数值模拟中观察到的，但这种振荡是弱的三维聚焦。
We show that a slab of meta-material (with e=μ=−1+iΔ) possesses a vortex-like surface wave with no ability to transport energy, whose nature is completely different from a localized mode or a standing wave. Through computations based on a rigorous time-dependent Green’s function approach, we demonstrate that such a mode inevitably generates characteristic image oscillations in two-dimensional focusing with even a monochromatic source, which were observed in many numerical simulations, but such oscillations are weak in three-dimensional focusing.