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Appl Opt. 2008 Jul 20;47(21):3694-700.

Design of subwavelength corrugated metal waveguides for slow waves at terahertz frequencies.

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  • 1Centre for Optical and Electromagnetic Research, Zhejiang University, China.


A subwavelength corrugated metal waveguide is studied and designed to slow down the light at terahertz frequencies. The waveguide consists of two parallel thin metal slabs with periodic corrugations on their inner boundaries. Compared with structures based on engineered surface plasmons, the proposed structure has smaller group velocity dispersion and lower propagation loss. The origin of the slow wave is also explained.

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