A dielectric mode in electroclinic liquid crystals

Linear electroclinic coupling in ferroelectric liquid crystals

We report a study of the electrodmic coupling (soft mode), close to the smectic A to smectic C* phase transition in several chiral compounds The main charactenstic of the technique used is to measure both optical and dielectric quantities on a single sample This

Electroclinic effect and modulated phases in smectic liquid crystals.

We explore the possibility that the unusually large electroclinic effect observed in the smectic-A phase of a ferroelectric liquid crystal arises from the presence of an ordered array of disclination lines and walls in a smectic-C* phase. If the spacing of these defects is in the subvisible range, this modulated smectic-C* phase would be similar macroscopically to a smectic-A phase. The applica...

Ferroelectric ordering and electroclinic effect in chiral smectic liquid crystals.

Ferroelectric ordering, the electroclinic effect, and chiral smectic C(SmC*)-smectic A phase transitions in thin planar ferroelectric liquid crystal (FLC) cells are studied by means of linear electro-optic and second harmonic generation (SHG) techniques. The ferroelectric switching is detected in biased FLC cells by measuring azimuthal dependences of linear and nonlinear responses. The applied ...

Demonstration of Gray Scale in Electroclinic Liquid Crystals

Liquid crystal (LC) materials possessing the chiral smectic A (Sm A) phase have been designed to yield high induced tilt angles and low response times. The primary objective of our work is to design materials that can provide the optimum tilt angle of 22.5° for applied voltages less than 5V/um, making them CMOS compatible. Optical response measurements to illustrate the feasibility of obtaining...

Dielectric Investigations on Ferroelectric Columnar Liquid Crystals