Domino plasmons for subwavelength terahertz circuitry

Details Domino plasmons for subwavelength terahertz circuitry Domino plasmons for subwavelength terahertz circuitry

2009-11-24

arxiv.org/abs/0911.4525v1

Opt. Express 18, 754-764 (2010)

Physics

Condensed Matter

Materials Science

7 pages, 5 figures

Scientific paper

10.1364/OE.18.000754

A new approach for the spatial and temporal modulation of electromagnetic fields at terahertz frequencies is presented. The waveguiding elements are based on plasmonic and metamaterial notions and consist of an easy-to-manufacture periodic chain of metallic box-shaped elements protruding out of a metallic surface. It is shown that the dispersion relation of the corresponding electromagnetic modes is rather insensitive to the waveguide width, preserving tight confinement and reasonable absorption loss even when the waveguide transverse dimensions are well in the subwavelength regime. This property enables the simple implementation of key devices, such as tapers and power dividers. Additionally, directional couplers, waveguide bends, and ring resonators are characterized, demonstrating the flexibility of the proposed concept and the prospects for terahertz applications requiring high integration density.

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