Dispersion relation of surface plasmon wave propagating along a curved metal-dielectric interface.
The dispersion relations of surface plasmon wave (SPW) propagating along a convex or concave metal-dielectric interface with a radius of curvature are studied by solving the root of a characteristic equation in terms of Bessel and Hankel functions of complex order numerically. For the convex geometry, a metallic circular cylinder embedded in a dielectric host is modeled, whereas for the concave one, a dielectric cylinder in a metallic host is modeled. We found that the phase velocity of SPW along a convex interface is always less than that of SPW along a planar one. On the contrary, the phase velocity of a concave case is faster than that of a planar one. For both cases, the attenuation constants are larger than a planar one, due to the radial radiation of the energy into the surrounding medium, except the dissipation in the metal.
Department of Mechanical Engineering, Chang Gung University, 259 Wen-Hwa 1st Rd., Kwei-Shan, Tao-Yuan 333, Taiwan. markliaw@mail.cgu.edu.tw
Jiunn-Woei
JW
Liaw
Po-Tsang
PT
Wu
D003198:Computer Simulation; D008027:Light; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D055095:Optics and Photonics; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*
D008670:Metals