2018/09/30 by Kevin Conley, Conley, Kevin, Neha Nayyar +11
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Plasmonic and Surface Plasmon Research #Surface and Thin Film Phenomena
paper · pdf · doi:10.48550/arxiv.1810.00404
openalex publication_date 2018/09/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.