Compensation of loss in propagating surface plasmon polariton by gain in adjacent dielectric medium

Abstract

We report the suppression of loss of surface plasmon polariton propagating at the interface between silver film and optically pumped polymer with dye. Large magnitude of the effect enables a variety of applications of "active" nanoplasmonics. The experimental study is accompanied by the development of the analytical description of the phenomenon and the solution of the controversy regarding the direction of the wavevector of a wave with a strong evanescent component in an active medium.

arXiv comment17 pages, 4 figures

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