Nanostructure induced changes in lifetime and enhanced second-harmonic response of organic-plasmonic hybrids

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Abstract

In this letter we show that the optical response of organic nanofibers, grown from functionalized para-quaterphenylene molecules, can be controlled by forming organic-plasmonic hybrid systems. The interaction between nanofibers and supporting regular arrays of nanostructures leads to a strongly enhanced second harmonic response. At the same time, the fluorescence lifetime of the nanofibers is reduced from 0.32 ns for unstructured goldfilms to 0.22 ns for gold nanosquare arrays, demonstrating efficient organic–plasmonic interaction. To study the origin of these effects, we applied two-photon laser scanning microscopy and fluorescence lifetime imaging microscopy. These findings provide an effective approach for plasmon-enhanced second-harmonic generation at the nanoscale, which is attractive for nanophotonic circuitry.
Original languageEnglish
JournalApplied Physics Letters
Volume107
Issue number25
Pages (from-to) 251102-(1-4)
Number of pages4
ISSN0003-6951
DOIs
Publication statusPublished - 21. Dec 2015

Keywords

  • Surface Plasmon Polaritons
  • Organic Plasmonic Hybrids
  • Fluorescence Lifetime
  • Fluorescence microscopy

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