Metasurface-based terahertz TE10-TE01 mode converter.

Applied optics Pub Date : 2025-09-20 DOI:10.1364/AO.568826
Boyi Yang, Xiaojie Guo, Yinghao Guo, Guobin Ren
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Abstract

We designed a compact broadband mode converter based on metasurface technology, operating in the 180-210 GHz band (the effective bandwidth is approximately 22 GHz), which achieves high-efficiency conversion from the TE10 mode in a standard WR-4 rectangular waveguide to the TE01 mode in a circular waveguide. The mode converter consists of two sub-mode converters: the first, based on a magic-T waveguide, transforms the TE10 mode into the TE20 mode, and the second, based on a metasurface, converts the TE20 mode into the TE01 mode. Simulation results demonstrate that the conversion efficiency from the TE10 mode to the TE01 mode reaches a maximum of 88.3% (184.6 GHz), with a return loss 8.4%. This metasurface-based mode converter can replace traditional complex transitional waveguide structures, providing a solution for generating high-quality TE01 mode in the terahertz band. Furthermore, the theoretical approach can be extended to the generation of other modes in the terahertz band.

基于超表面的太赫兹TE10-TE01模式转换器。
我们设计了一种基于超表面技术的紧凑型宽带模式转换器,工作在180-210 GHz频段(有效带宽约为22 GHz),实现了从标准WR-4矩形波导中的TE10模式到圆波导中的TE01模式的高效转换。模式转换器由两个子模式转换器组成:第一个基于magic-T波导,将TE10模式转换为TE20模式;第二个基于超表面,将TE20模式转换为TE01模式。仿真结果表明,从TE10模式到TE01模式的转换效率最高可达88.3% (184.6 GHz),回波损耗为8.4%。这种基于超表面的模式转换器可以取代传统复杂的过渡波导结构,为在太赫兹波段产生高质量的TE01模式提供了一种解决方案。此外,理论方法可以推广到太赫兹波段其他模式的产生。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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