Excitation of remarkably nondispersive surface plasmons on a nondiffracting, dual-pitch metal grating.

Autor: Hibbins, Alastair P., Sambles, J. Roy, Lawrence, Chris R.
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Zdroj: Applied Physics Letters; 4/1/2002, Vol. 80 Issue 13, p2410, 3p, 1 Diagram, 4 Graphs
Abstrakt: A nondiffracting metallic lamellar grating formed from three equally spaced grooves per repeat period, with one being slightly shallower than the other two is examined at microwave frequencies. When filled with a slightly lossy dielectric, this structure supports a remarkably nondispersive surface plasmon polariton mode, which exhibits strong selective absorption of incident power. Measured reflectivities show excellent agreement with the results predicted by a rigorous coupled wave theory. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index