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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 25 — Sep. 1, 2002
  • pp: 5362–5366

Electric-field-induced motion of polymer cholesteric liquid-crystal flakes in a moderately conductive fluid

Tanya Z. Kosc, Kenneth L. Marshall, Stephen D. Jacobs, John C. Lambropoulos, and Sadeg M. Faris  »View Author Affiliations


Applied Optics, Vol. 41, Issue 25, pp. 5362-5366 (2002)
http://dx.doi.org/10.1364/AO.41.005362


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Abstract

Polymer cholesteric liquid-crystal flakes suspended in a fluid with nonnegligible conductivity can exhibit motion in the presence of an ac electric field. The plateletlike particles with a Grandjean texture initially lie parallel to the cell substrates and exhibit a strong selective reflection that is diminished or extinguished as the flakes move. Flake motion was seen within a specific frequency bandwidth in an electric field as low as 5 mVrms/µm. Flakes reoriented about their longest axis to align parallel to the applied field, and a rise time of 560 ms was seen in a 40-mVrms/µm field at 100 Hz.

© 2002 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices
(350.4990) Other areas of optics : Particles

History
Original Manuscript: March 22, 2002
Revised Manuscript: May 20, 2002
Published: September 1, 2002

Citation
Tanya Z. Kosc, Kenneth L. Marshall, Stephen D. Jacobs, John C. Lambropoulos, and Sadeg M. Faris, "Electric-field-induced motion of polymer cholesteric liquid-crystal flakes in a moderately conductive fluid," Appl. Opt. 41, 5362-5366 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-25-5362

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