Three-Dimensional Infrared Metamaterial with Asymmetric Transmission
Three-Dimensional Infrared Metamaterial with Asymmetric Transmission
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DOI：
10.1021/ph5003818
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发表时间：
2015-02-01
期刊：
影响因子：
7
通讯作者：
Economou, Eleftherios N.
中科院分区：
文献类型：
--
作者：
Kenanakis, George;Xomalis, Aggelos;Economou, Eleftherios N.
在红外光谱区展示了一种具有线偏振不对称透射的新型三维金属超材料结构。该结构是通过直接激光写入和选择性化学镀银制备的，这是一种简单，新颖的技术，可以产生机械和化学稳定的三维光子结构。该结构单元胞由一对导电耦合的磁谐振器组成，其不对称传输响应是电响应和磁响应相互作用的结果；这使得结构沿着一个传播方向几乎完全不透明，而沿着相反的方向则具有令人满意的透明度。它还提供易于调节的阻抗，90度单向纯光学活性和反向传播的可能性，从而在偏振控制和隔离应用中具有独特的能力。我们还表明，缩小结构可以使其能够在光学区域展示其不对称传输和偏振能力。
A novel three-dimensional (3D) metallic metamaterial structure with asymmetric transmission for linear polarization is demonstrated in the infrared spectral region. The structure was fabricated by direct laser writing and selective electroless silver coating, a straightforward, novel technique producing mechanically and chemically stable 3D photonic structures. The structure unit cell is composed of a pair of conductively coupled magnetic resonators, and the asymmetric transmission response results from interplay of electric and magnetic responses; this equips the structure with almost total opaqueness along one propagation direction versus satisfying transparency along the opposite one. It also offers easily adjustable impedance, 90 degrees one-way pure optical activity and backward propagation possibility, resulting thus in unique capabilities in polarization control and isolation applications. We show also that scaling down the structure can make it capable of exhibiting its asymmetric transmission and its polarization capabilities in the optical region.