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Defect trajectories and domain-wall loop dynamics during two-frequency switching in a bistable azimuthal nematic device

Davidson, A.J. and Brown, C.V. and Mottram, N.J. and Ladak, S. and Evans, C.R. (2010) Defect trajectories and domain-wall loop dynamics during two-frequency switching in a bistable azimuthal nematic device. Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 81 (5). 051712. ISSN 1063-651X

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Abstract

Bistable azimuthal nematic alignment textures have been created in micrometer-scale channels for which one sidewall is smooth and straight and the other possesses a symmetric sawtooth morphology. The optical textures have been observed during dynamic switching between the two stable states in response to dual frequency ac waveform driving of a highly dispersive nematic liquid crystal. The switching processes involves collapsing of filamentlike director reorientation (tilt-wall) loops and the associated motion and annihilation of surface defects along and close to the edge at the sawtooth sidewall. The predictions from both the n-director-based Ericksen-Leslie theory and the Q-tensor theory are in good agreement with the experimental observations

Item type: Article
ID code: 28115
Keywords: optical textures, dynamic switching, nematic liquid crystal, Mathematics, Physics, Physics and Astronomy(all), Mathematical Physics, Statistical and Nonlinear Physics, Condensed Matter Physics
Subjects: Science > Mathematics
Science > Physics
Department: Faculty of Science > Mathematics and Statistics
Related URLs:
Depositing user: Mrs Carolynne Westwood
Date Deposited: 13 Oct 2010 14:57
Last modified: 28 Mar 2014 05:29
URI: http://strathprints.strath.ac.uk/id/eprint/28115

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