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We have investigated the Bragg gratings for surface plasmonic polaritons modes in the metal-dielectric-air waveguide and proposed a bidirectional coupler which is capable to guide the incident light at different wavelengths along two predetermined directions.
Experimental study of new type of plasmonic cavities is reported. We demonstrate the excitation of localised modes, with very high light confinement. The cavities are suitable for devices operating in the strong light-matter coupling regime.
An in-plane Fresnel zone plate for focusing surface plasmon polariton (SPP) fields has been designed, fabricated and tested. Diffractive SPP fields from each Fresnel zone constructively interfere and focus at the designed focal point.
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