Abstract
A cylindrical structure consisting of a metallic core, an inner semiconductor shell, and an outer metallic shell may serve as a light-emitting tunnel junction. The emission may be enhanced by excitation of surface plasmons if the outer layer is silver. Equations for the radiation field are given for the case in which the light source is a line dipole within one of the coaxial regions. Calculations for an aluminum core, an inner shell with m = 1.5, and a silver coating show that the excitation of surface plasmons by such sources will give large enhancements of the radiation field.
© 1986 Optical Society of America
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