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Standing-Wave Plasmonic Resonance in Terahertz Extraordinary Transmission

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4 Author(s)
Dan Hu ; Dept. of Phys., Harbin Inst. of Technol., Harbin, China ; Shengfei Feng ; Bizhen Dong ; Yan Zhang

The effect of total circumference on the terahertz transmission response of coaxial H-shaped annular aperture arrays punctured in a thin metal film on a silicon substrate is investigated. Unexpectedly, the resonance frequencies are not sensitive to the details of the shape for the coaxial annular aperture, but intensely depend on the total circumference in a unit cell. Furthermore, a clear inverse proportion relationship between the resonance frequencies and the total circumference is revealed and confirmed experimentally, which is interpreted by the standing-wave plasmonic resonance mechanism. This characteristic paves an avenue to the quick and accurate construction of the desired operating frequencies for filtering, biosensing, and ultrafast switching applications.

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Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:19 ,  Issue: 1 )