Hybrid-aligned nematic liquid-crystal modulators fabricated on VLSI circuits

Hybrid-aligned nematic liquid-crystal modulators fabricated on VLSI circuits.

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 ...

Polarization rotator using a hybrid aligned nematic liquid crystal cell.

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...

Nematic Liquid Crystal Spatial Light Modulators for Laser Beam Steering

Rayleigh-Bénard convection in a homeotropically aligned nematic liquid crystal

We report experimental results for convection near onset in a thin layer of a homeotropically aligned nematic liquid crystal heated from below as a function of the temperature difference DT and the applied vertical magnetic field H . When possible, these results are compared with theoretical calculations. The experiments were done with three cylindrical cells of aspect ratios @~radius!/~height!...

Linear flexo-electro-optic effect in a hybrid aligned nematic liquid crystal cell

2014 A hybrid aligned nematic liquid crystal sample presents a bulk flexo-electric polarization P. The coupling of P with an external electric field normal to the bounding plates allows, for weak anchoring, a texture distortion. We report a new linear flexo-electro-optic effect in such a cell with a weak anchoring, which presents an electrically controlled birefringence. The results also indica...