Sub-millisecond, high stroke phase modulation using polymer network liquid crystals.

We describe the production of a high speed, and high stroke, phase modulator using a polymer network liquid crystal device. We present data showing fast response times (sub millisecond) in a device which can operate at visible wavelengths with a simple electrical addressing scheme.

Effects of monomer functionality on switchable holographic gratings formed in polymer-dispersed liquid-crystal cells.

We investigate the effects of monomer functionality on the formation and switching characteristics of holographic transmission gratings in polymer-dispersed liquid-crystal cells fabricated by using the 633 nm wavelength of an He-Ne laser. We present results for the microstructure, diffraction efficiency eta, and switching characteristics of gratings formed with acrylate monomers of functionalities ranging from 2 to 4. The microstructure and diffraction efficiency are sensitive to functionality; both improve with increasing functionality. For functionalities of 2.5 or more, eta approaches 34% and can be switched off with electric fields of about 20 MV m(-1).

Switchable holographic gratings formed in polymer-dispersed liquid-crystal cells by use of a He-Ne laser.

We report on the formation of switchable holographic transmission gratings in polymer-dispersed liquid-crystal cells by use of the 633-nm wavelength of a He-Ne laser. We present results for the structure, diffraction efficiency, and switching characteristics of the gratings.