Low-Power Laser Induced Instabilities in Smectic A Liquid Crystals

Low-Power Laser Induced Instabilities in Smectic A Liquid Crystals

A low power He-Ne laser beam is shown to induce layer instabilities in a smectic A liquid crystal cell possessing initial homeotropic orientation. The effect occurs when the smectic A phase is doped with a photosensitive azo-compound. The most plausible mechanism for the instability is photo-transfo...

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Veröffentlicht in:Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Molecular crystals and liquid crystals, 1995-03, Vol.261 (1), p.259-270
Hauptverfasser: Folks, W. R., Reznikov, Yu. A., Chen, L., Khizhnyak, A. I., Lavrentovich, O. D.
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Sprache:eng
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Zusammenfassung:A low power He-Ne laser beam is shown to induce layer instabilities in a smectic A liquid crystal cell possessing initial homeotropic orientation. The effect occurs when the smectic A phase is doped with a photosensitive azo-compound. The most plausible mechanism for the instability is photo-transformation of the guest molecules (e.g. trans-cis isomerization), and a subsequent decrease in the smectic layer spacing.
ISSN:1058-725X
DOI:10.1080/10587259508033473