6533b82afe1ef96bd128c456
RESEARCH PRODUCT
Plasmon Excitations in Mixed Metallic Nanoarrays
Martti J. PuskaTalat S. RahmanTuomas P. RossiNeha NayyarVolodymyr TurkowskiMikael KuismaKevin Conleysubject
Materials scienceGeneral Physics and AstronomyFOS: Physical sciences02 engineering and technologyElectronoptiset ominaisuudet01 natural sciencesMolecular physicsElectromagnetic radiationHomonuclear moleculeplasmonicsnanorakenteet0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Physics::Atomic and Molecular Clusterstransition contribution mapsGeneral Materials ScienceSurface plasmon resonance010306 general physicsPlasmonCondensed Matter - Materials ScienceCondensed Matter - Mesoscale and Nanoscale Physicsta114Surface plasmontiheysfunktionaaliteoriaGeneral EngineeringMaterials Science (cond-mat.mtrl-sci)molecular plasmonics021001 nanoscience & nanotechnologytime-dependent density-functional theorytime-dependent density functional theorycollective excitationQuasiparticleDensity functional theory0210 nano-technologydescription
Features of the surface plasmon from macroscopic materials emerge in molecular systems, but differentiating collective excitations from single-particle excitations in molecular systems remains elusive. The rich interactions between single-particle electron-hole and collective electron excitations produce phenomena related to the chemical physics aspects within the atomic array. We study the plasmonic properties of atomic arrays of noble (Au, Ag, and Cu) and transition-metal (Pd, Pt) homonuclear chains using time-dependent density functional theory and their Kohn-Sham transition contributions. The response to the electromagnetic radiation is related to both the geometry-dependent confinement of sp-valence electrons and the energy position of d-electrons in the different atomic species and the hybridization between d and sp electrons. It is possible to tune the position of the plasmon resonance, split it into several peaks, and eventually achieve broadband absorption of radiation. Arrays of mixed noble and transition-metal chains may have strongly attenuated plasmonic behavior. The collective nature of the excitations is ascertained using their Kohn-Sham transition contributions. To manipulate the plasmonic response and achieve the desired properties for broad applications, it is vital to understand the origins of these phenomena in atomic chains and their arrays. © 2019 American Chemical Society. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-04-11 |