Terahertz Radiation from Combined Metallic Slit Arrays
Terahertz Radiation from Combined Metallic Slit Arrays
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DOI：
10.1038/s41598-019-43072-2
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发表时间：
2019-05-02
影响因子：
4.6
通讯作者：
Yang, Ziqiang
中科院分区：
文献类型：
--
作者：
Li, Dazhi;Nakajima, Makoto;Yang, Ziqiang
我们报告了一种从组合周期结构有效产生太赫兹辐射的方法。所提出的配置由两个精心设计的具有不同周期长度、狭缝宽度和深度的金属狭缝阵列组成。我们发现两个狭缝阵列的组合可以提供特殊的电磁模式，该电磁模式在一个狭缝阵列的表面上方表现出非辐射特性，而在另一个狭缝阵列的内部表现出辐射特性。持有适当能量的电子束可以与这些模式共振，产生太赫兹范围内的强定向电磁辐射，表明该方法具有开发高性能太赫兹辐射源的潜力。
We report an approach to efficiently generate terahertz radiation from a combined periodic structure. The proposed configuration is composed of two metallic slit arrays deliberately designed with different periodic length, slit width and depth. We found that the combination of the two slit arrays could provide special electromagnetic modes, which exhibit nonradiative property above the surface of one slit array and radiative property inside the other one. An electron beam holding proper energy could resonate with those modes to generate strong and directional electromagnetic radiations in the terahertz regime, indicating that the approach has the potential in developing high-performance terahertz radiation sources.