The theory of hybrid surface plasma modes in metal-coated dielectric cylinders has been developed in recent years. We demonstrate that tapered fibers with a uniform waist and a circular metal coating can be designed for an efficient excitation of the fundamental hybrid surface plasma mode. Our experimental results are in good agreement with the theory and give the basis for the development of a novel type of all-fiber polarization-independent refractive-index sensor and tunable broadband wavelength filter.
© 1999 Optical Society of America
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(310.2790) Thin films : Guided waves
Antonio Díez, Miguel V. Andrés, and José L. Cruz, "Hybrid surface plasma modes in circular metal-coated tapered fibers," J. Opt. Soc. Am. A 16, 2978-2982 (1999)