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Proceedings Paper

Photomodulating the spontaneous polarization of a ferroelectric liquid crystal phase using chiral thioindigo dopants
Author(s): Liviu Dinescu; Robert P. Lemieux
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Paper Abstract

The chiral thioindigo dye (R,R)-5,5'-dinitro-6,6'-bis(2- octyloxy)thioindigo has been synthesized in optically active form and doped into a racemic SC liquid crystal host (xd equals 0.028) to induce a ferroelectric SC* phase. Irradiation of an aligned sample of this induced SC* phase at (lambda) greater than 450 nm produces a cis- enriched photostationary state of the dopant, and an increase in the spontaneous polarization of the SC* phase by a factor of 1.8. This modulation is reversible via thermal relaxation of the dopant to the trans-form.

Paper Details

Date Published: 11 April 1997
PDF: 5 pages
Proc. SPIE 3015, Liquid Crystal Materials, Devices, and Applications V, (11 April 1997); doi: 10.1117/12.271398
Show Author Affiliations
Liviu Dinescu, Queen's Univ. (Canada)
Robert P. Lemieux, Queen's Univ. (Canada)


Published in SPIE Proceedings Vol. 3015:
Liquid Crystal Materials, Devices, and Applications V
Ranganathan Shashidhar, Editor(s)

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