Surface plasmon mediated transmission of subwavelength slits at THz frequencies

被引：61

作者：

Isaac, T. H. ^{[1
]}

Rivas, J. Gomez ^{[2
]}

Sambles, J. R.

Barnes, W. L. ^{[1
]}

Hendry, E. ^{[1
]}

机构：

[1] Univ Exeter, Sch Phys, Exeter EX4 4QL, Devon, England

[2] FOM, Inst Atom & Mol Phys, NL-1098 SJ Amsterdam, Netherlands

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.77.113411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present measurements and a numerical modeling that elucidate the role of surface plasmons in the resonant transmission of a subwavelength slit in a conducting material. By using THz time domain spectroscopy, we determine the Fabry-Perot transmission resonances for a single slit formed from a wafer of a semiconductor with a surface plasma frequency in the THz frequency range. We measure large redshifts in the resonant frequencies close to the surface plasma frequency, which are 50% lower than the resonance frequencies expected well below the surface plasma frequency. This is an effect attributed to the coupling of plasmons on the adjacent surfaces of the slit.

引用

页数：4

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