Low-frequency plasmon excitations in multicoaxial NIM cables

By using an elegant response function theory, which does not require matching of the messy boundary conditions,

we investigate the surface plasmon excitations in the multicoaxial cylindrical cables made up of

negative-index metamaterials. The multicoaxial cables with dispersive metamaterial components exhibit a

rather richer (and complex) plasmon spectrum with each interface supporting two modes: one TM and the

other TE for m0 (the integer order of the Bessel function). The cables with 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.