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.
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页数：4
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