Subwavelength focusing with a corrugated metallic plate
Subwavelength focusing with a corrugated metallic plate
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使用波纹金属板进行亚波长聚焦
DOI：
10.1109/aps.2009.5172270
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
A. Grbic
中科院分区：
文献类型：
--
作者：
M. Imani;A. Grbic
在本文中，我们提出了一种能够以亚波长分辨率聚焦电磁场的装置。该装置由波纹金属板上的单个狭缝组成。板的输入面具有周期性波纹，可增强通过狭缝的传输，而板的输出面具有非周期性波纹，可形成亚波长焦点。仿真和自由空间测量结果在 10 GHz 下进行，证实了波纹板形成亚波长焦点的能力。在实验中，板的输入面被高斯光束照射，并且在距板的输出面的距离λ/15处形成亚波长焦点。
In this paper, we presented a device that can focus electromagnetic field with subwavelength resolution. The device consists of a single slit in a corrugated metallic plate. The input face of the plate features a periodic corrugation which enhances transmission through the slit, while the output face of the plate features a non-periodic corrugation which forms the subwavelength focus. Simulation and free-space measurements are reported at 10 GHz, confirming the corrugated plate's ability to form a subwavelength focus. In the experiments, the input face of the plate was illuminated with a Gaussian beam, and a subwavelength focus was formed at a distance λ/15 from the output face of the plate.