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Waveguiding, Microcavity Effects and Optically Pumped Lasing in Single Melt Processed Polyfluorene Nanowires

Published online by Cambridge University Press:  26 February 2011

Deirdre O'Carroll  and
Gareth Redmond
Deirdre O'Carroll
Affiliation:
deirdre.ocarroll@tyndall.ie, Tyndall National Institute, Nanotechnology Group, Lee Maltings,, Prospect Row, Cork, -, Ireland
Gareth Redmond
Affiliation:
gareth.redmond@tyndall.ie, Tyndall National Institute, Nanotechnology Group, Lee Maltings,, Prospect Row, Cork, ,, Ireland
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Abstract

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.

Keywords

polymernanostructureluminescence
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 965: Symposium S – Organic Electronics – Materials, Devices and Applications , 2006 , 0965-S03-05
Copyright
Copyright © Materials Research Society 2007

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References

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