  We study the plasmonic properties of arrays of atomic chains which comprise
noble (Cu, Ag, and Au) and transition (Pd, Pt) metal atoms using time-dependent
density-functional theory. We show that the response to the electromagnetic
radiation is related to both physics, the geometry-dependent confinement of
sp-valence electrons, and chemistry, the energy position of d-electrons in the
different atomic species and the hybridization between d and sp electrons. As a
result it is possible to tune the position of the surface plasmon resonance,
split it to several peaks, and eventually achieve broadband absorption of
radiation. Mixing the arrays with transition metals can strongly attenuate the
plasmonic behaviour. We analyze the origin of these phenomena and show that
they arise from rich interactions between single-particle electron-hole and
collective electron excitations. The tunability of the plasmonic response of
arrays of atomic chains, which can be realized on solid surfaces, opens wide
possibilities for their applications. In the present study we obtain guidelines
how the desired properties can be achieved.
