Flow-Induced Twist-Compression in a Twisted Nematic Cell
Ruan, Lizhen; Sambles, J. Roy
Date: 25 April 2003
Journal
Physical Review Letters
Publisher
American Physical Society
Publisher DOI
Abstract
An optical convergent-beam guided-wave technique is used to explore in detail the dynamic flow effects in a twisted nematic cell. During switch-on it is found that the dynamic flow compresses the director twist to regions close to the cell walls. For high fields this twist compression takes the cell far beyond the Mauguin limit and it ...
An optical convergent-beam guided-wave technique is used to explore in detail the dynamic flow effects in a twisted nematic cell. During switch-on it is found that the dynamic flow compresses the director twist to regions close to the cell walls. For high fields this twist compression takes the cell far beyond the Mauguin limit and it no longer effectively guides the polarization of the light through the cell. This results in a very fast switch to a transient dark state.
Physics and Astronomy
Faculty of Environment, Science and Economy
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