Single- and three-pulse photoselection of dye probes in nematic liquid crystals

Daven A. Armoogum; Jason Bryant; Eugenio M. Monge; Angus J. Bain

doi:10.1117/12.452487

12 December 2002 Single and three pulse photoselection of dye probes in nematic liquid crystals

Daven A. Armoogum, Jason Bryant, Eugenio M. Monge, Angus J. Bain

Proceedings Volume 4799, Liquid Crystals VI; (2002) https://doi.org/10.1117/12.452487
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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 (γ_φ/γ_θ~4).

Citation Download Citation

Daven A. Armoogum, Jason Bryant, Eugenio M. Monge, and Angus J. Bain "Single and three pulse photoselection of dye probes in nematic liquid crystals", Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); https://doi.org/10.1117/12.452487

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