Performing Mathematical Operations with Metamaterials
Performing Mathematical Operations with Metamaterials
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DOI：
10.1126/science.1242818
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发表时间：
2014-01-10
期刊：
影响因子：
56.9
通讯作者：
Engheta, Nader
中科院分区：
文献类型：
--
作者：
Silva, Alexandre;Monticone, Francesco;Engheta, Nader
我们引入了超材料模拟计算的概念，基于适当设计的超材料块，当入射波通过这些块传播时，超材料块可以对入射波的轮廓执行数学运算(如空间微分、积分或卷积)。提出了两种实现这种功能的方法：(I)结合渐变折射率光波导的亚波长结构变屏幕和(Ii)为实现所需的空间格林函数而设计的多层平板。这两种技术都提供了小型化、潜在可集成的基于波的计算系统的可能性，这些系统比传统的基于透镜的光学信号和数据处理器薄几个数量级。
We introduce the concept of metamaterial analog computing, based on suitably designed metamaterial blocks that can perform mathematical operations (such as spatial differentiation, integration, or convolution) on the profile of an impinging wave as it propagates through these blocks. Two approaches are presented to achieve such functionality: (i) subwavelength structured metascreens combined with graded-index waveguides and (ii) multilayered slabs designed to achieve a desired spatial Green's function. Both techniques offer the possibility of miniaturized, potentially integrable, wave-based computing systems that are thinner than conventional lens-based optical signal and data processors by several orders of magnitude.