Atomistic Characterization of Plasmonic Dimers in the Quantum Size Regime

Pengchong Liu, Dhabih V. Chulhai, Lasse Jensen

Research output: Contribution to journalArticle

Abstract

Plasmonic dimer systems show great promise in a wide range of applications because of their unique optical and electronic properties that arise from the coupling of monomer plasmons. To determine the origin of each plasmonic mode and understand the plasmon coupling, atomistic quantum mechanical simulations are required. Here, we adopt a Hirshfeld partitioning scheme of atomic charges and polarizabilities within the time-dependent density functional theory framework to study the plasmonic properties of plasmonic dimers. We are able to separate the charge-transfer plasmons because of electron tunneling from local-resonance plasmons by the partitioned polarizabilities and induced charges. We find that the strength of charge-transfer plasmons is limited by the charge-flow pathways and dependent on the chemical species. New plasmonic modes for a series of tetrahedral dimers are identified by mapping the induced charges. This approach allows for intuitive and consistent characterizations of strongly coupled plasmonic systems.

Original languageEnglish (US)
Pages (from-to)13900-13907
Number of pages8
JournalJournal of Physical Chemistry C
Volume123
Issue number22
DOIs
StatePublished - Jun 6 2019

Fingerprint

Plasmons
plasmons
Dimers
dimers
Charge transfer
charge transfer
Electron tunneling
electron tunneling
Electronic properties
Density functional theory
Optical properties
monomers
Monomers
density functional theory
optical properties
electronics
simulation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Liu, Pengchong ; Chulhai, Dhabih V. ; Jensen, Lasse. / Atomistic Characterization of Plasmonic Dimers in the Quantum Size Regime. In: Journal of Physical Chemistry C. 2019 ; Vol. 123, No. 22. pp. 13900-13907.
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Atomistic Characterization of Plasmonic Dimers in the Quantum Size Regime. / Liu, Pengchong; Chulhai, Dhabih V.; Jensen, Lasse.

In: Journal of Physical Chemistry C, Vol. 123, No. 22, 06.06.2019, p. 13900-13907.

Research output: Contribution to journalArticle

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