Confined low-frequency plasmonic paves in multicoaxial NIM cables

We report on the surface plasmon excitations in the multicoaxial, negative-index metamaterials (NIM) cylindrical canles -- using an elegant response function theory, which does not require matching of the messy boundary conditions. The multicoaxial cables with {\em dispersive} metamaterial components exhibit rather richer (and complex) plasmon spectrum with each interface supporting two modes: one TM and the other TE for (the integer order of the Bessel function) $m \ne 0$. The cables with {\em nondispersive} metamaterial components bear a different tale: they do not support simultaneously both TM and TE modes over the whole range of propagation vector. The computed local
and total density of states enable us to substantiate spatial positions of the modes in the spectrum. Such quasi-one dimensional systems as studied here should prove to be the milestones of the emerging optoelectronics and telecommunications systems. {see, for instances,
J. Opt. Soc. Am. B {\bf 27}, 148 (2010); {\bf 27}, 605 (2010). }