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 language | English |
|---|---|
| Pages (from-to) | 2468-2473 |
| Number of pages | 6 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 40 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - May 2008 |
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Keywords
- Conjugated polymers
- Nanowires
- Polyfluorene
- Waveguides
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Polyfluorene nanowire active waveguides as sub-wavelength polarized light sources. / O'Carroll, Deirdre M; Redmond, Gareth.
In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 40, No. 7, 05.2008, p. 2468-2473.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Polyfluorene nanowire active waveguides as sub-wavelength polarized light sources
AU - O'Carroll, Deirdre M
AU - Redmond, Gareth
PY - 2008/5
Y1 - 2008/5
N2 - 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.
AB - 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.
KW - Conjugated polymers
KW - Nanowires
KW - Polyfluorene
KW - Waveguides
UR - http://www.scopus.com/inward/record.url?scp=43849083685&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=43849083685&partnerID=8YFLogxK
U2 - 10.1016/j.physe.2007.10.009
DO - 10.1016/j.physe.2007.10.009
M3 - Article
VL - 40
SP - 2468
EP - 2473
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 7
ER -