“…Dispersion relations and transient processes (wave packet transmission) in plasmonic chains have also been studied in detail. 19,20,[27][28][29] In particular, it was found that chains of spherical particles cannot support propagation of well-formed wave packets due to the flatness of the corresponding dispersion curves. This, in particular, has motivated our interest in chains of non-spherical particles such as prolate or oblate spheroids, 20,21 which can serve as broadband SPP waveguides.…”