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Proceedings Paper

Photo-induced reorientation phenomena in dyed liquid crystals: recent steps toward a complete understanding of the underlying mechanism
Author(s): Lorenzo Marrucci
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Paper Abstract

A survey of recent results of experiments aimed at understanding the basic mechanism of the photoinduced reorientation phenomena in dye-doped liquid crystals is presented. In particular, I shall focus on experiments based on the isotopic substitution of hydrogen atoms with deuterium in dye molecules, which have shown an unexpected enhancement of the photoinduced reorientation effect by a factor two. The isotopic substitution also changes the dye excited state lifetime and orientational diffusion times. These results are in good agreement with the model proposed for the effect, and confirm the hypothesis that the active photoexcited state in the photoinduced reorientation phenomena is simply the first-excited singlet electronic state of dye molecules.

Paper Details

Date Published: 12 December 2002
PDF: 9 pages
Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); doi: 10.1117/12.453279
Show Author Affiliations
Lorenzo Marrucci, Univ. degli Studi di Napoli Federico II (Italy)
INFM (Italy)

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

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