Dual-frequency addressed hybrid-aligned nematic liquid crystal
نویسندگان
چکیده
منابع مشابه
Optical characterization of a dual-frequency hybrid aligned nematic liquid crystal cell.
The dielectric anisotropy of a highly dispersive dual-frequency nematic liquid crystal (MDA-00-3969 (Merck KGa)) has been determined using the optical fully-leaky guided-mode technique. A 4Vrms sinusoidal voltage was applied across a 5microm hybrid aligned nematic (HAN) cell at various frequencies in both the positive and negative dielectric anisotropy regime. Optical data was collected at each...
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The dynamic response of a chiral dual-frequency hybrid aligned nematic liquid-crystal cell to a multiple frequency pulse has been characterized using a time-resolved fully leaky guided-mode optical characterization technique. On application of a low-frequency voltage the cell is found to switch to homeotropic alignment, effectively destroying the inherent twist in the cell. When this voltage is...
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A new method for fabricating analog light modulators on VLSI devices is described. The process is fully compatible with devices fabricated by commercial VLSI foundries, and the assembly of the modulator structures requires a small number of simple processing steps. The modulators are capable of analog amplitude or phase modulation and can operate at video rates and at low voltages (2.2 V). The ...
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Using both direct mathematical analysis and numerical modeling based on the predictions by Jones [1] it is shown that if the director in a liquid crystal cell is in a plane which lies at 45 degrees to the incident polarization, then, for normally incident light, the transmission signal which conserves polarization will always have a phase difference of pi/2 from the transmission signal of the o...
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We report on a thermodielectric bistability in dual frequency nematic liquid crystals (LCs) caused by the anisotropic nature of dielectric heating and director reorientation in an electric field. The bistability is a result of the positive feedback loop: director reorientation --> anisotropic dielectric heating --> dielectric anisotrophy --> director reorientation. We demonstrate both experimen...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2004
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.1809282