Excitation of multiple dipole surface plasmon resonances in spherical silver nanoparticles

Bjoern Niesen, Barry P. Rand, Pol Van Dorpe, Honghui Shen, Bjorn Maes, Jan Genoe, Paul Heremans

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We observe the appearance of multiple dipole surface plasmon resonances in spherical Ag nanoparticles when embedded in an organic semiconductor that exhibits a highly dispersive permittivity. Comparing the absorption spectra of thin-films with and without Ag nanoparticles reveals the presence of two plasmon peaks. Numerical simulations and calculations based on an electrostatic model allow us to attribute both peaks to dipole resonances, and show that the strong dispersion of the organic permittivity is responsible for this behavior. The presence of these two plasmon resonances was found to enhance the absorption of the organic semiconductor over a broad wavelength range.

Original languageEnglish (US)
Pages (from-to)19032-19038
Number of pages7
JournalOptics Express
Volume18
Issue number18
DOIs
StatePublished - Aug 30 2010

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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