Single-mode subwavelength waveguide with channel plasmon-polaritons in triangular grooves on a metal surface | Zendy

Dmitri K. Gramotnev | Zendy; David Pile | Zendy

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Single-mode subwavelength waveguide with channel plasmon-polaritons in triangular grooves on a metal surface

Author(s) -

Dmitri K. Gramotnev,

David Pile

Publication year - 2004

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1839283

Subject(s) - surface plasmon polariton , groove (engineering) , surface plasmon , plasmon , materials science , polariton , optics , waveguide , penetration depth , localized surface plasmon , optoelectronics , physics , metallurgy

We demonstrate that single-mode operation of a sub-wavelength plasmonic waveguide in the form of a V-groove on a metal surface can be achieved by adjusting depth of the groove. Strongly localized channel plasmon-polaritons (CPPs) are shown to propagate in such waveguides. If the groove depth is close to the penetration depth of the fundamental CPP mode, then all higher modes are not supported by the structure, leaving only the fundamental mode propagating in the groove. In this case, propagation distances of fundamental mode ~ 10 micron can easily be achieved together with strong sub-wavelength localization

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