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Published January 1, 2001 | Published
Journal Article Open

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


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 (lambda= 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 0.05lambda 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.

Additional Information

© 2001 American Institute of Physics. (Received 21 July 2000; accepted 9 November 2000) The authors would like to thank Bill Bridges for useful discussions and for letting them use his microwave laboratory at Caltech. This work was sponsored by the National Science Foundation.

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