Plasmonic coupling in noble metal nanostructures

Prashant K. Jain, Mostafa A. El-Sayed

Research output: Contribution to journalArticle

Abstract

Noble metal nanostructures display unique and strongly enhanced optical properties due to the phenomenon of localized surface plasmon resonance (LSPR). In assemblies or complex noble metal nanostructures, individual plasmon oscillations on proximal particles can couple via their near-field interaction, resulting in coupled plasmon resonance modes, quite akin to excitonic coupling in molecular aggregates or orbital hybridization in molecules. In this frontier Letter we discuss how the coupling of plasmon modes in certain nanostructure geometries (such as nanoparticle dimers and nanoshells) allows systematic tuning of the optical resonance, and also the confinement and enhancement of the near-field, making possible improved refractive-index sensing and field-enhanced spectroscopy and photochemistry. We discuss the polarization, orientation, and distance-dependence of this near-field coupling especially the universal size-scaling of the plasmon coupling interaction. In addition to radiative properties, we also discuss the effect of inter-particle coupling on the non-radiative electron relaxation in noble metal nanostructures.

Original languageEnglish (US)
Pages (from-to)153-164
Number of pages12
JournalChemical Physics Letters
Volume487
Issue number4-6
DOIs
StatePublished - Mar 5 2010
Externally publishedYes

Fingerprint

Precious metals
noble metals
Nanostructures
near fields
Nanoshells
Photochemical reactions
Surface plasmon resonance
optical resonance
Dimers
Refractive index
surface plasmon resonance
Optical properties
Tuning
photochemical reactions
assemblies
Spectroscopy
Polarization
Nanoparticles
Molecules
tuning

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Plasmonic coupling in noble metal nanostructures. / Jain, Prashant K.; El-Sayed, Mostafa A.

In: Chemical Physics Letters, Vol. 487, No. 4-6, 05.03.2010, p. 153-164.

Research output: Contribution to journalArticle

Jain, Prashant K. ; El-Sayed, Mostafa A. / Plasmonic coupling in noble metal nanostructures. In: Chemical Physics Letters. 2010 ; Vol. 487, No. 4-6. pp. 153-164.
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