VOLTAGE-CONTROLLED OPTICAL BISTABILITY IN A TWISTED NEMATIC LIQUID-CRYSTAL CELL BETWEEN CROSSED POLARIZERS

Authors
BLOISI F TERRECUSO P VICARI L
Citation
F. Bloisi et al., VOLTAGE-CONTROLLED OPTICAL BISTABILITY IN A TWISTED NEMATIC LIQUID-CRYSTAL CELL BETWEEN CROSSED POLARIZERS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 290, 1996, pp. 11-19
Citations number
11
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
290
Year of publication
1996
Pages
11 - 19
Database
ISI
SICI code
1058-725X(1996)290:<11:VOBIAT>2.0.ZU;2-N
Abstract
We report experimental results about the bistability effect given by t he light induced creation of an isotropic hole in a 90 degrees twisted nematic liquid crystal cell between two crossed polarizers. The twist ed structure acts as a polarization rotator so that the device is init ially transparent, but becomes opaque if the twisted structure is brok en, due to liquid crystal nematic-isotropic phase transition. The effe ct can be electrically driven controlling the nematic director configu ration inside the cell.