Domino plasmons for subwavelength terahertz circuitry

Abstract

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.

7 pages, 5 figures

References in corpus (3)

• Terahertz surface plasmon polariton propagation and focusing on periodically corrugated metal wires
• Nanoconcentration of Terahertz Radiation in Plasmonic Waveguides
• Extremely short-length surface plasmon resonance sensors

Cited by in corpus (5)

• Nanofocusing of Hyperbolic Phonon-Polaritons in a Tapered Boron Nitride Slab
• Enhanced Efficiency of Light-Trapping Nanoantenna Arrays for Thin Film Solar Cells
• Guiding, bending, and splitting of coupled defect surface modes in a surface-wave photonic crystal
• Single-photon source over the terahertz regime
• Tunable band-notched line-defect waveguide in a surface-wave photonic crystal