Photomodulating the spontaneous polarization of a ferroelectric liquid crystal phase using chiral thioindigo dopants

Liviu Dinescu; Robert P. Lemieux

doi:10.1117/12.271398

11 April 1997 Photomodulating the spontaneous polarization of a ferroelectric liquid crystal phase using chiral thioindigo dopants

Liviu Dinescu, Robert P. Lemieux

Author Affiliations +

Proceedings Volume 3015, Liquid Crystal Materials, Devices, and Applications V; (1997) https://doi.org/10.1117/12.271398
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

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 S_C liquid crystal host (x_d equals 0.028) to induce a ferroelectric S_C* phase. Irradiation of an aligned sample of this induced S_C* 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 S_C* phase by a factor of 1.8. This modulation is reversible via thermal relaxation of the dopant to the trans-form.

Citation Download Citation

Liviu Dinescu and Robert P. Lemieux "Photomodulating the spontaneous polarization of a ferroelectric liquid crystal phase using chiral thioindigo dopants", Proc. SPIE 3015, Liquid Crystal Materials, Devices, and Applications V, (11 April 1997); https://doi.org/10.1117/12.271398

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