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We investigate the phenomenon of negative refraction (NR) in metallic waveguide arrays (MWGAs) by illuminating partial waveguides. Some waveguides in MWGAs are sheltered and the other waveguides are opened; only these opened waveguides can be illuminated by the incident wave. These illuminated waveguides will be independently excited surface plasmon polariton (SPP) supermodes at the entrances, which...
We investigative the field distribution in a limited number of nanostructured metal waveguide arrays. The precise positions of self-imaging are obtained. We derive the perturbation constant and the coupling constant by perturbation approach and supermode theory in a system that contains two adjacent waveguides. The perturbation constant and the coupling constant can also be applied to the systems...
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