Revealing the underlying mechanisms behind TE extraordinary THz transmission
Revealing the underlying mechanisms behind TE extraordinary THz transmission
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DOI：
10.1364/prj.8.000430
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发表时间：
2020-04-01
影响因子：
7.6
通讯作者：
Navarro-Cia, Miguel
中科院分区：
文献类型：
--
作者：
Freer, Suzanna;Camacho, Miguel;Navarro-Cia, Miguel
通过看似不透明表面的传输，即所谓的非凡传输，为强光与物质相互作用、光谱学、光学捕获和滤色提供了令人兴奋的平台。大部分的努力都致力于理解和利用 TM 异常传输，而 TE 异常传输在文献中很大程度上被忽略了。从实践的角度来看，这是令人遗憾的，因为 TE 异常传输对阵列基板的更强依赖性提供了额外的设计参数供开发使用。为了提供基于 TE 异常传输的高性能和经济高效的应用，必须首先对这种现象的潜在机制有一个完整的物理洞察。为此，本文采用准光学太赫兹（THz）时域测量、全波模拟和矩分析方法相结合的方法，研究了s偏振照明下的亚波长狭缝阵列，填补了现有文献的空白。我们相信这项工作明确揭示了接地电介质板模式在 TE 异常非凡传输中的漏波作用，并为设计实用的高性能太赫兹组件和系统提供了必要的框架。由中国激光出版社根据知识共享署名4.0许可条款出版。
Transmission through seemingly opaque surfaces, so-called extraordinary transmission, provides an exciting platform for strong light-matter interaction, spectroscopy, optical trapping, and color filtering. Much of the effort has been devoted to understanding and exploiting TM extraordinary transmission, while TE anomalous extraordinary transmission has been largely omitted in the literature. This is regrettable from a practical point of view since the stronger dependence of the TE anomalous extraordinary transmission on the array's substrate provides additional design parameters for exploitation. To provide high-performance and cost-effective applications based on TE anomalous extraordinary transmission, a complete physical insight about the underlying mechanisms of the phenomenon must be first laid down. To this end, resorting to a combined methodology including quasi-optical terahertz (THz) time-domain measurements, full-wave simulations, and method of moments analysis, subwave-length slit arrays under s-polarized illumination are studied here, filling the void in the current literature. We believe this work unequivocally reveals the leaky-wave role of the grounded-dielectric slab mode mediating in TE anomalous extraordinary transmission and provides the necessary framework to design practical high-performance THz components and systems. Published by Chinese Laser Press under the terms of the Creative Commons Attribution 4.0 License.