Waveguided spoof surface plasmons with deep-subwavelength lateral confinement

We present a new type of waveguide scheme for terahertz circuitry based on the concept of spoof surface plasmons. This structure is composed of a one-dimensional array of L-shaped metallic elements horizontally attached to a metal surface. The dispersion relation of the surface electromagnetic modes...

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Veröffentlicht in:	Optics letters 2011-12, Vol.36 (23), p.4635-4637
Hauptverfasser:	MARTIN-CANO, Diego, QUEVEDO-TERUEL, O, MORENO, Esteban, MARTIN-MORENO, L, GARCIA-VIDAL, F. J
Format:	Artikel
Sprache:	eng
Schlagworte:	Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Fundamental areas of phenomenology (including applications) Optical elements, devices, and systems Optical waveguides and coupleurs Optics Physics Surface and interface electron states
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Beschreibung
Zusammenfassung:	We present a new type of waveguide scheme for terahertz circuitry based on the concept of spoof surface plasmons. This structure is composed of a one-dimensional array of L-shaped metallic elements horizontally attached to a metal surface. The dispersion relation of the surface electromagnetic modes supported by this system presents a very weak dependence with the lateral dimension and the modes are very deep-subwavelength confined with a long-enough propagation length.
ISSN:	0146-9592 1539-4794
DOI:	10.1364/OL.36.004635