s-偏振光通过亚波长狭缝增强透射的观测
Observation of enhanced transmission for s-polarized light through a subwavelength slit
摘要：
对于p-偏振光，通常获得通过亚波长孔径的增强光学透射（EOT）。本研究实验研究了s-偏振光的EOT。在金膜上制作了一个亚波长的狭缝，狭缝的两侧被周期性的沟槽所包围，并被一层薄的电介质层覆盖。介质膜内部s偏振介质波导模式的激发强烈地增加了s偏振传输。传输测量耦合模式模型进行了比较，并表现出良好的定性协议。添加波导可以改善通过亚波长孔径的光传输，因为s偏振和p偏振都可以有效地传输。
英文摘要：
Enhanced optical transmission (EOT) through subwavelength apertures is usually obtained for p-polarized light. The present study experimentally investigates EOT for s-polarized light. A subwavelength slit surrounded on each side by periodic grooves has been fabricated in a gold film and covered by a thin dielectric layer. The excitation of s-polarized dielectric waveguide modes inside the dielectric film strongly increases the s-polarized transmission. Transmission measurements are compared with a coupled mode model and show good qualitative agreement. Adding a waveguide can improve light transmission through subwavelength apertures, as both s and p-polarization can be efficiently transmitted.
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