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Proceedings Paper

Single- and three-pulse photoselection of dye probes in nematic liquid crystals
Author(s): Daven A. Armoogum; Jason Bryant; Eugenio M. Monge; Angus J. Bain
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Paper Abstract

We present results of single and three pulse photoselection studies of the dynamics of a fluorescent probe (Oxazine 4) in the nematic phase of the liquid crystal 4-n-pentyl-4'-cyanobiphenyl (5CB). The combination of these techniques with time resolved fluorescence anisotropy measurements allows the unambiguous determination of the full angular motion of the probe together with the ground and excited state degrees of equilibrium (steady state) alignment. The restricted geometry imposed by the nematic host is seen to impart a marked anisotropy in θ and Φ diffusion (γφθ~4).

Paper Details

Date Published: 12 December 2002
PDF: 11 pages
Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); doi: 10.1117/12.452487
Show Author Affiliations
Daven A. Armoogum, Univ. College London (United Kingdom)
Jason Bryant, Univ. College London (United Kingdom)
Eugenio M. Monge, Univ. College London (United Kingdom)
Angus J. Bain, Univ. College London (United Kingdom)


Published in SPIE Proceedings Vol. 4799:
Liquid Crystals VI
Iam-Choon Khoo, Editor(s)

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