Enhanced nonlinear effects in pulse propagation through epsilon-near-zero media
Enhanced nonlinear effects in pulse propagation through epsilon-near-zero media
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DOI：
10.1002/lpor.201500326
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发表时间：
2016-05-01
影响因子：
11
通讯作者：
Scalora, Michael
中科院分区：
文献类型：
--
作者：
Ciattoni, Alessandro;Rizza, Carlo;Scalora, Michael
近年来，超材料的非传统性质引发了一场电磁研究革命，揭示了波-物质相互作用的新场景。非常小的介电常数是这种不寻常特征的主要例子，因为它产生了一种奇异的类似静态的状态，其中电磁场在空间上缓慢变化，在物理上很大的区域内变化。因此，所谓的epsilon-近零超材料提供了一个理想的平台，可以在其中操纵“拉伸”场的内部细节。在这里，我们从理论上证明，如果介电常数在场宽范围内很小，那么标准的非线性就能够操控到这样的程度，即使是一块薄板也能产生戏剧性的非线性脉冲变换。由近零条件产生的完全非线性耦合的预测非共振释放不求助于任何场增强机制，并开辟了利用物质[图形]非线性来通过超紧凑结构来引导辐射的新途径。
In recent years, unconventional metamaterial properties have triggered a revolution of electromagnetic research which has unveiled novel scenarios of wave-matter interaction. A very small dielectric permittivity is a leading example of such unusual features, since it produces an exotic static-like regime where the electromagnetic field is spatially slowly-varying over a physically large region. The so-called epsilon-near-zero metamaterials thus offer an ideal platform where to manipulate the inner details of the "stretched" field. Here we theoretically prove that a standard nonlinearity is able to operate such a manipulation to the point that even a thin slab produces a dramatic nonlinear pulse transformation, if the dielectric permittivity is very small within the field bandwidth. The predicted non-resonant releasing of full nonlinear coupling produced by the epsilonnear-zero condition does not resort to any field enhancement mechanism and opens novel routes to exploiting matter[GRAPHICS]nonlinearity for steering the radiation by means of ultra-compact structures.