@article{discovery10043653,
          number = {3},
           month = {February},
           title = {Surface modes in plasmonic Bragg fibers with negative average permittivity},
            year = {2018},
         journal = {Optics Express},
          volume = {26},
            note = {This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.},
           pages = {2559--2568},
            issn = {1094-4087},
        abstract = {We investigate surface modes in plasmonic Bragg fibers composed of nanostructured coaxial cylindrical metal-dielectric multilayers. We demonstrate that the existence of surface modes is determined by the sign of the spatially averaged permittivity of the plasmonic Bragg fiber, {\ensuremath{\epsilon}}. Specifically, localized surface modes occur at the interface between the cylindrical core with {\ensuremath{\epsilon}} {\ensuremath{<}} 0 and the outermost uniform dielectric medium, which is similar to the topologically protected plasmonic surface modes at the interface between two di erent one-dimensional planar metal-dielectric lattices with opposite signs of the averaged permittivity. Moreover, when increasing the number of dielectric-metal rings, the propagation constant of surface modes with di erent azimuthal mode numbers is approaching that of surface plasmon polaritons formed at the corresponding planar metal/dielectric interface. Robustness of such surface modes of plasmonic Bragg fibers is demonstrated as well.},
          author = {Deng, H and Chen, Y and Panoiu, NC and Malomed, BA and Ye, F},
             url = {http://doi.org/10.1364/OE.26.002559},
        keywords = {Surface plasmons; Surface dynamics; Subwavelength structures,
nanostructures; Nanophotonics and photonic crystals}
}