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Fast phase modulation using dual‐frequency nematic liquid crystals
Author(s) -
Barnik Mikhail I.,
Palto Serguei P.
Publication year - 2007
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.2770862
Subject(s) - liquid crystal , anisotropy , materials science , instability , optics , phase (matter) , modulation (music) , dielectric , condensed matter physics , mechanics , physics , optoelectronics , acoustics , quantum mechanics
— Experimental study and numerical simulations of optical phase modulators based on nematic liquid crystals characterized by frequency sign inversion of the dielectric anisotropy has been performed. The received results point out an extreme role of back‐flow effects and electro‐hydrodynamic instability, which make restrictions for creating high‐speed phase modulators with large switchable values of phase retardation. It is shown by numerical simulations that the hydrodynamic destabilization can be suppressed by decreasing the ratio of Leslie coefficients |α 2 /α 4,5 |.