Electromagnetic energy transport along arrays of closely spaced metal rods as an analogue to plasmonic devices

Maier, Stefan A.; Brongersma, Mark L.; Atwater, Harry A.
January 2001
Applied Physics Letters;1/1/2001, Vol. 78 Issue 1, p16
Academic Journal
The transport of electromagnetic energy along structures consisting of arrays of closely spaced metal rods (spacing=0.2 cm) was investigated in the microwave regime at 8.0 GHz (λ=3.7 cm). The dispersion relation shows that information transport occurs at a group velocity of 0.6c. The electromagnetic energy is highly confined to the arrays (90% within a distance of 0.05λ from the array). The propagation loss in a straight array is 3 dB/8 cm. Routing of energy around 90° corners is possible with a power loss of 3-4 dB. Analogies to plasmon wires consisting of arrays of nm-size metal clusters are discussed. © 2001 American Institute of Physics.


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