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太赫兹波段下金属狭缝的透射增强特性研究
Resonant transmission of the terahertz pulse through a subwavelength metallic slit
【摘要】 用太赫兹时域光谱技术研究了具有不同宽度的金属狭缝透射光谱特征.实验结果显示在实验测量有效光谱范围(0.2THz—2.6THz)内,当狭缝宽度小到一定程度,在频谱中出现了共振增强,具有明显的带通带阻现象,并在理论上分析了这种共振透射现象的原因.
【Abstract】 The transmission property of a single thin metallic slit with different widths has been investigated by terahertz (THz) time-domain spectroscopy. The experiment results show that in the effective spectroscopic range (0.2—2.6?THz), the Fabry-Perot-like behavior was observed when the slit width decreases to a certain value. According to the theory of surface plasmon subwavelength optics, this resonant phenomenon was analyzed.
【关键词】 表面等离子体;
太赫兹脉冲;
时域光谱技术;
金属狭缝;
【Key words】 surface plasmons; terahertz pulse; time-domain spectroscopy; metallic slit;
【Key words】 surface plasmons; terahertz pulse; time-domain spectroscopy; metallic slit;
【基金】 国家重点基础研究发展计划(973)项目(批准号:2006CB302901和2007CB310408);国家自然科学基金(批准号:10604042)资助的课题~~
- 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2008年05期
- 【分类号】O436
- 【被引频次】14
- 【下载频次】401