Waveguiding, microcavity effects and optically pumped lasing in single melt processed polyfluorene nanowires

Deirdre O'Carroll, Gareth Redmond

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The synthesis of poly(9,9-dioctylfluorene) conjugated polymer nanowires using the method of melt-assisted wetting of nanoporous alumina membrane templates is reported. Polymer nanowires exhibiting blue photoluminescence emission with diameters of approx. 300 nm are obtained. Absorption and photoluminescence spectra of nanowire mats indicate that the nanowires consist of the semi-crystalline form of the polymer. Single wires exhibit active waveguide behavior whereby excited luminescence propagates towards and out-couples at the tips of the nanowires. Spectra of out-coupled emission exhibit multiple modes with mode spacing corresponding to longitudinal Fabry-Pérot cavities of equivalent lengths to those of the nanowires. Above a threshold incident pump energy spectral collapse to a single blue shifted peak with instrument limited line width occurs characteristic of single mode lasing.

Original languageEnglish
Title of host publicationOrganic Electronics
Subtitle of host publicationMaterials, Devices and Applications
Number of pages6
Publication statusPublished - Dec 1 2006
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 27 2006Nov 30 2006

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2006 MRS Fall Meeting
CountryUnited States
CityBoston, MA


ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

O'Carroll, D., & Redmond, G. (2006). Waveguiding, microcavity effects and optically pumped lasing in single melt processed polyfluorene nanowires. In Organic Electronics: Materials, Devices and Applications (pp. 240-245). (Materials Research Society Symposium Proceedings; Vol. 965).