Gold Helix Photonic Metamaterial as Broadband Circular Polarizer
Gold Helix Photonic Metamaterial as Broadband Circular Polarizer
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DOI：
10.1126/science.1177031
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发表时间：
2009-09-18
期刊：
影响因子：
56.9
通讯作者：
Wegener, Martin
中科院分区：
文献类型：
--
作者：
Gansel, Justyna K.;Thiel, Michael;Wegener, Martin
我们研究了光通过一种单轴光子超材料的传输，该材料由三维的金螺旋排列在二维正方形晶格上。这些纳米结构是通过一种基于直接激光写入正色光刻胶然后电化学沉积金的方法来制备的。对于沿螺旋轴的光传播，该结构用与螺旋相同的利手来阻挡圆偏振，而对于超过一个八度的频率范围，它传输另一个。该结构可扩展到其他频率范围，并可用作紧凑型宽带圆偏振器。
We investigated propagation of light through a uniaxial photonic metamaterial composed of three-dimensional gold helices arranged on a two-dimensional square lattice. These nanostructures are fabricated via an approach based on direct laser writing into a positive-tone photoresist followed by electrochemical deposition of gold. For propagation of light along the helix axis, the structure blocks the circular polarization with the same handedness as the helices, whereas it transmits the other, for a frequency range exceeding one octave. The structure is scalable to other frequency ranges and can be used as a compact broadband circular polarizer.