Article

Terahertz pulse propagation using plasmon-polariton-like surface modes on structured conductive surfaces

Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom
Applied Physics Letters (impact factor: 3.84). 07/2006; DOI:10.1063/1.2216105 pp.251120 - 251120-3
Source: IEEE Xplore

ABSTRACT The dispersion relation and confinement of plasmon-polariton-like terahertz surface modes sustained by a perfectly conducting planar surface patterned with a regular lattice of holes are studied using full-field three-dimensional numerical simulations. Edge coupling and subsequent surface guiding with subwavelength vertical confinement of the frequency components below the band edge of the surface mode is demonstrated for a broadband pulse with 0.5 THz ≤f≤2 THz . Additionally, the constraints imposed by lattice constant and hole size on the creation of defect waveguides offering lateral confinement are discussed.

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Keywords

conducting planar surface
 
dispersion relation
 
frequency components
 
full-field three-dimensional numerical simulations
 
hole size
 
plasmon-polariton-like terahertz surface modes
 
regular lattice
 
subwavelength vertical confinement
 
surface mode
 

Stefan A Maier