Subwavelength metallic resonators provide tight spatial confinement of electromagnetic fields, required for strong light‐matter coupling. However far‐field techniques prove to be impractical for detection of such fields. In article 1900254, Lucy Hale, Giacomo Scalari, and co‐workers demonstrate the use of aperture‐type near‐field terahertz spectroscopy for detailed analysis of the confined fields in the single‐resonator regime without significant perturbations to the resonator signature. This provides a more accurate and more sensitive alternative to far‐field THz spectroscopy.

中文翻译：

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近场太赫兹光谱：单个亚波长互补谐振器的非侵入性近场光谱（激光光子学，修订版14（4）/ 2020）

亚波长金属谐振器提供了电磁场的紧密空间限制，这是强光-物质耦合所必需的。然而，事实证明，远场技术对于检测此类场是不切实际的。在文章1900254中，露西·黑尔（Lucy Hale），贾科莫·斯卡拉里（Giacomo Scalari）及其同事演示了使用孔径型近场太赫兹光谱技术对单谐振器范围内的受限场进行详细分析，而对谐振器信号没有明显干扰。这为远场太赫兹光谱提供了更准确，更灵敏的替代方案。