Polyfluorene nanowire active waveguides as sub-wavelength polarized light sources

Deirdre M O'Carroll, Gareth Redmond

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Poly(9,9-dioctylfluorene) conjugated polymer nanowire active waveguides were fabricated by melt-assisted wetting of porous anodic alumina templates. Selected-area electron diffraction studies indicated that the wires were semi-crystalline with a radial orientation of the polymer molecules. Under ultraviolet excitation, the characteristic blue light emission of the polymer was strongly confined within the wires, propagating towards and out-coupling at the nanowire tips. Single wire polarization-resolved photoluminescence data indicated that the nanowire tips essentially acted as sub-wavelength polarized light sources. Detailed optical measurements made on single wires in vacuum and in a polymer host confirmed that the measured emission anisotropy was not an environment-related artefact but was due to radial packing of the polymer molecules within the wires.

Original languageEnglish
Pages (from-to)2468-2473
Number of pages6
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume40
Issue number7
DOIs
Publication statusPublished - May 2008

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Keywords

  • Conjugated polymers
  • Nanowires
  • Polyfluorene
  • Waveguides

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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