Resonant surface polaritons of the cylindrical near-field tip

The propagation parameters and their relation with the medium properties were investigated for surface polaritons excited in coated cylindrical waveguide. The possibility of excitation of symmetric and antisymmetric types of polariton's modes has been demonstrated for a cylindrical three-layer waveguide with a metal cladding. It has ben shown that the near field of cylindrical surface polariton can be theoretically localized to an arbitrarily small space. The conditions for total localization of the near field of the TM 0 -mode were determined by numerical simulation for three-layer waveguide with a metal core. The result of this analysis can be used for development of more effective probes for IR near-field devices.