Near-Infrared Polarization-Manipulated Anisotropic Transmission Through Metallic Array of Subwavelength Fractal Slits
Near-Infrared Polarization-Manipulated Anisotropic Transmission Through Metallic Array of Subwavelength Fractal Slits
复制标题
DOI：
10.1109/lpt.2011.2119475
复制
发表时间：
2011-05
影响因子：
2.6
通讯作者：
Y. Qiu;Xiao Hu;L. Zhan;Q. Shen;Yuxing Xia
中科院分区：
文献类型：
--
作者：
Y. Qiu;Xiao Hu;L. Zhan;Q. Shen;Yuxing Xia
已经实现了近红外（从1μm到1.4μm）区域通过Ag薄膜上的亚波长分形狭缝的传输。仿真和实验均证明了偏振操纵各向异性透射和斜入射不变性的存在。还证明膜深度是局部共振的重要因素。研究了修改后的狭缝长度和图案的光谱，并与周期性矩形和方孔阵列的光谱进行了比较。已证实各向异性透射和角度不变透射来自于其长边界垂直于入射偏振的最大矩形狭缝。这些结果为峰值集中偏振控制光学器件提供了应用。
Transmission through subwavelength fractal slits on Ag film in near-infrared (from 1 μm to 1.4 μm ) region has been achieved. It is proved by both simulation and experiment that polarization-manipulated anisotropic transmission and oblique incidence invariance exist. It is also demonstrated that the film depth constitutes an important factor for local resonances. Spectra of modified slits' length and pattern are investigated, and are compared with that of periodic rectangular and square hole array. It is confirmed that anisotropic transmission and angle invariance transmission come from the largest rectangular slits whose long borders are normal to incidence polarization. These results pose applications for peak-concentrated polarization-controlled optical device.