Abstract
When a thin metallic region exists between the core and the cladding regions of a step-index optical fiber, hybrid surface plasma modes can be supported. For each azimuthal mode order two hybrid modes generally occur. Their disperison and attenuation characteristics are studied. The selective influence of the core radius on these is found to be strong only if the radius is small. As the radius increases the modes become degenerate with those of the pure TM polarization.
© 1993 Optical Society of America
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