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首页> 外文期刊>Optics Letters >Single negative birefringence in stacked spoof plasmon metasurfaces by prism experiment
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Single negative birefringence in stacked spoof plasmon metasurfaces by prism experiment

机译:叠层欺骗等离子体子表面中的单负双折射

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摘要

We report negative and positive refraction in a prism made of stacked perforated thin surfaces for s and p polarization, respectively. By corrugating the subwavelength slits of a free-standing periodic arrangement, geometrically induced surface-plasmon-like currents are excited and transmission is allowed under s polarization (electric-field vector parallel to the slit). When several of those corrugated slit arrays are subwavelength stacked, the stack behaves as a negative effective index medium (because of double negativity) under s polarization, whereas it behaves as a positive effective index medium under p polarization. The birefringence has been confirmed by the usual wedge experiment in the millimeter-wave range.
机译:我们分别在由堆叠的穿孔薄表面制成的棱镜中报告了s和p偏振的负折射和正折射。通过对独立式周期性排列的亚波长缝隙进行波纹处理,可以激发几何感应的表面等离激元状电流,并在s极化(平行于缝隙的电场矢量)下允许传输。当这些波纹状狭缝阵列中的几个被亚波长堆叠时,该堆叠在s极化下表现为负有效折射率介质(由于双重负性),而在p极化下表现为正有效折射率介质。通过在毫米波范围内的常规楔形实验已经证实了双折射。

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