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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 16 — Aug. 12, 2013
  • pp: 19103–19112

Layer-by-layer self-assembly of plexcitonic nanoparticles

Brendan G. DeLacy, Wenjun Qiu, Marin Soljačić, Chia Wei Hsu, Owen D. Miller, Steven G. Johnson, and John D. Joannopoulos  »View Author Affiliations

Optics Express, Vol. 21, Issue 16, pp. 19103-19112 (2013)

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Colloidal suspensions of multilayer nanoparticles composed of a silver core, a polyelectrolyte spacer layer (inner shell), and a J-aggregate cyanine dye outer shell have been prepared for the first time. Absorption properties of the colloid were measured in the visible region. This multilayer architecture served as a framework for examining the coupling of the localized surface plasmon resonance exhibited by the silver core with the molecular exciton exhibited by the J-aggregate outer shell. The polyelectrolyte spacer layer promotes the formation of an excitonic J-aggregate while serving as a means of controlling the plasmon-exciton (i.e. plexciton) coupling strength through changing the distance between the core and the shell. An analytical expression based on Mie Theory and the Transfer Matrix Method was obtained for describing the optical response of these multilayered nanostructures. Computational and experimental results indicate that the absorption wavelength of the J-aggregate form of the dye is dependent on both the distance of the dye layer from the silver core and the degree of dye aggregation.

© 2013 OSA

OCIS Codes
(290.2200) Scattering : Extinction
(160.4236) Materials : Nanomaterials
(290.5825) Scattering : Scattering theory

ToC Category:

Original Manuscript: March 27, 2013
Manuscript Accepted: June 18, 2013
Published: August 5, 2013

Virtual Issues
Vol. 8, Iss. 9 Virtual Journal for Biomedical Optics

Brendan G. DeLacy, Wenjun Qiu, Marin Soljačić, Chia Wei Hsu, Owen D. Miller, Steven G. Johnson, and John D. Joannopoulos, "Layer-by-layer self-assembly of plexcitonic nanoparticles," Opt. Express 21, 19103-19112 (2013)

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