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Designer reflectors using spoof surface plasmons in the terahertz range

Jingbo Liu, Rajind Mendis, and Daniel M. Mittleman
Phys. Rev. B 86, 241405(R) – Published 21 December 2012

Abstract

We show that spoof surface plasmons can be used to control the reflection of terahertz radiation at the output facet of a parallel-plate waveguide. Using a periodic groove pattern on the output face, reflectivity approaching 100% can be achieved within a limited spectral range. Unlike the conventional geometry for plasmon-enhanced transmission, this approach enables a unique method for studying the coupling between the guided mode and the surface plasmon through angle-dependent measurement of the plasmon-mediated reflection. A simple model incorporating the surface plasmon coupling to the waveguide mode can adequately explain all of the observed phenomena, including the observed Goos-Hänchen shift in the reflected beam.

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  • Received 17 September 2012

DOI:https://doi.org/10.1103/PhysRevB.86.241405

©2012 American Physical Society

Authors & Affiliations

Jingbo Liu, Rajind Mendis, and Daniel M. Mittleman

  • Department of Electrical and Computer Engineering, MS 378, Rice University, Houston, Texas 77251-1892, USA

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Issue

Vol. 86, Iss. 24 — 15 December 2012

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