Terahertz spoof surface plasmon polaritons unidirectional coupling via slit pair

Spoof surface plasmon polaritons (SSPPs), as a new frontier in the terahertz (THz) range, is difficult to be effectively directional launched. In this paper, based on the near-field interference of the SSPPs generated by a pair of slits, we demonstrate that the oblique incident plane wave results in...

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Bibliographic Details
Published in2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC) p. 1
Main Authors Heng-He Tang, Pu-Kun Liu
Format Conference Proceeding
LanguageEnglish
Published International Union of Radio Science (URSI) 01.05.2015
Subjects
Couplers
Diffraction
Dispersion
Finite element analysis
Gratings
Plasmons
Surface plasmon polaritons
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Summary:Spoof surface plasmon polaritons (SSPPs), as a new frontier in the terahertz (THz) range, is difficult to be effectively directional launched. In this paper, based on the near-field interference of the SSPPs generated by a pair of slits, we demonstrate that the oblique incident plane wave results in the unidirectional excitation of SSPPs. The extinction ration obtained with the finite element method (FEM) reaches up to 5.5. The coupler is potentially useful in the THz highly integrated plasmonic circuits.
DOI:10.1109/URSI-AT-RASC.2015.7302844