Off-resonant two-photon absorption cross-section enhancement of an organic chromophore on gold nanorods

Sean T. Sivapalan, Jarrett H. Vella, Timothy K. Yang, Matthew J. Dalton, Joy E. Haley, Thomas M. Cooper, Augustine M. Urbas, Loon Seng Tan, Catherine J. Murphy

Research output: Contribution to journalArticle

Abstract

Surface-plasmon-initiated interference effects of polyelectrolyte-coated gold nanorods on the two-photon absorption of an organic chromophore were investigated. With polyelectrolyte-bearing gold nanorods of two, four, six, and eight layers, the role of the plasmonic fields as function of distance on such effects was examined. An unusual distance dependence was found: enhancements in the two-photon cross-section were at a minimum at an intermediate distance, then rose again at a further distance. The observed values of enhancement were compared to theoretical predictions using finite element analysis and showed good agreement due to constructive and destructive interference effects.

Original languageEnglish (US)
Pages (from-to)749-752
Number of pages4
JournalJournal of Physical Chemistry Letters
Volume4
Issue number5
DOIs
StatePublished - Mar 7 2013

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Keywords

  • and Hard Matter
  • Optical Materials
  • Plasmonics

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Sivapalan, S. T., Vella, J. H., Yang, T. K., Dalton, M. J., Haley, J. E., Cooper, T. M., Urbas, A. M., Tan, L. S., & Murphy, C. J. (2013). Off-resonant two-photon absorption cross-section enhancement of an organic chromophore on gold nanorods. Journal of Physical Chemistry Letters, 4(5), 749-752. https://doi.org/10.1021/jz4000774