In this paper, we demonstrate the feasibility of realizing the extraordinary optical transmission (EOT) and the collimated beaming effect through InSb grating, which has a subwavelength slit surrounded by a finite array of grooves at both sides of the surface. Firstly, we investigate the transmission properties of the structure by changing the temperature and doping concentration of InSb, and the optimized transmission can reach almost 95%. Besides, it is verified that the transmission is mainly controlled by the pattern on the input corrugation with the variable dimension parameters. At last, the properties of the beaming intensity and focal length are thoroughly analyzed with the variation of the number and depth of the grooves on the output corrugation. These results provide a new plasmonic solution for controlling light in a variety of integrated optical components in the terahertz range.

中文翻译：

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通过在太赫兹范围具有狭缝的 InSb 亚波长光栅的增强透射和光束效应的研究

在本文中，我们证明了通过 InSb 光栅实现非凡光学传输 (EOT) 和准直光束效应的可行性，InSb 光栅在表面两侧有一个由有限阵列凹槽包围的亚波长狭缝。首先，我们通过改变 InSb 的温度和掺杂浓度来研究结构的透射特性，优化后的透射率可以达到近 95%。此外，验证了传输主要由输入波纹上的图案控制，具有可变尺寸参数。最后，根据输出波纹槽的数量和深度的变化，深入分析了光束强度和焦距的特性。