THz wavefront manipulation based on metal waveguides
THz wavefront manipulation based on metal waveguides
复制标题
基于金属波导的太赫兹波前操纵
DOI：
10.1080/09500340.2018.1441918
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发表时间：
2018-03
影响因子：
1.3
通讯作者：
Han Zhanghua
中科院分区：
文献类型：
--
作者：
Wu Mengru;Lang Tingting;Shen Changyu;Shi Guohua;Han Zhanghua
Abstract In this paper, two waveguiding structures for arbitrary wavefront manipulation in the terahertz spectral region were proposed, designed and characterized. The first structure consists of parallel stack copper plates forming an array of parallel-plate waveguides (PPWGs). The second structure is three-dimensional metal rectangular waveguides array. The phase delay of the input wave after passing through the waveguide array is mainly determined by the effective index of the waveguides. Therefore, the waveguide array can be engineered using different core width distribution to generate any desired light beam. Examples, working at the frequency of 0.3 THz show that good focusing phenomenon with different focus lengths and spot sizes were observed, as well as arbitrarily tilted propagation of incident plane waves. The structure introduces a new method to perform wavefront manipulation, and can be utilized in many important applications in terahertz imaging and communication systems.
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