Davidson, A. J., Brown, C. V., Mottram, N. J. , 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, 81(5), 051712. (doi: 10.1103/PhysRevE.81.051712) (PMID:20866252)
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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: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Mottram, Professor Nigel |
| Authors: | Davidson, A. J., Brown, C. V., Mottram, N. J., Ladak, S., and Evans, C. R. |
| College/School: | College of Science and Engineering > School of Mathematics and Statistics > Mathematics |
| Journal Name: | Physical Review E |
| Publisher: | American Physical Society |
| ISSN: | 1539-3755 |
| ISSN (Online): | 1550-2376 |
| Published Online: | 27 May 2010 |
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