scholarly journals Time-resolved switching analysis of a ferroelectric liquid crystal by snapshot Mueller matrix polarimetry

2010 ◽  
Vol 35 (7) ◽  
pp. 1019 ◽  
Author(s):  
Matthieu Dubreuil ◽  
Sylvain Rivet ◽  
Bernard Le Jeune ◽  
Laurent Dupont
Keyword(s):  
Liquid Crystal ◽  
Mueller Matrix ◽  
Ferroelectric Liquid Crystal ◽  
Time Resolved

Vibrational Studies on the Dynamics of Switching between the Surface-Stabilized States of a Ferroelectric Liquid Crystal by Asynchronous Time-Resolved Fourier Transform Infrared Spectroscopy

1993 ◽  
Vol 47 (9) ◽  
pp. 1370-1375 ◽  
Author(s):  
Koji Masutani ◽  
Akira Yokota ◽  
Yukio Furukawa ◽  
Mitsuo Tasumi ◽  
Atsushi Yoshizawa
Keyword(s):  
Liquid Crystal ◽  
Time Behavior ◽  
Ferroelectric Liquid Crystal ◽  
Slow Process ◽  
Fast Process ◽  
Time Resolved ◽  
Smectic C ◽  
Rigid Molecule ◽  
Vibrational Studies

Time-resolved polarized infrared spectra have been observed from a ferroelectric liquid crystal (chiral smectic C phase) consisting of a chiral dopant and a nonchiral smectic base during the course of switching between the surface-stabilized states. A primary fast process and the subsequent slow process have been observed for all infrared bands. The chiral dopant and smectic base molecules move simultaneously. The observed time behavior of the infrared bands can be mostly explained by the reorientation of a rigid molecule whose rotational motion around the molecular long axis is almost free. The static intensities and the time behavior of the ester and keto C=O stretching bands do not seem to be consistent with the simple view on the role of these groups.

Submicrosecond Preliminary Process of Electric-Field-Induced Reorientation of a Ferroelectric Liquid Crystal, 5-(2-Fluoroalkoxy)-2-(4-n-Alkylphenyl)-Pyrimidine, Studied by Time-Resolved Infrared Spectroscopy

1995 ◽  
Vol 49 (7) ◽  
pp. 977-980 ◽  
Author(s):  
Norihisa Katayama ◽  
Takashi Sato ◽  
Yukihiro Ozaki ◽  
Katsuyuki Murashiro ◽  
Makoto Kikuchi ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Delay Time ◽  
Strong Influence ◽  
Spectroscopic Technique ◽  
Ferroelectric Liquid Crystal ◽  
Time Resolved ◽  
Rigid Rod ◽  
Time Resolved Infrared Spectroscopy ◽  
Reorientation Process

Pulsed electric-field-induced reorientation of a ferroelectric liquid crystal (FLC), 5-(2-fluorooctyloxy)-2-(4-hexylphenyl)-pyrimidine, has been investigated by using a dispersive submicrosecond time-resolved infrared spectroscopic technique. The observed absorbance decay for a band at 1440 cm−1 due to a ring-stretching mode of the phenylpyrimidine group indicates that the FLC molecule reorients from a stationary state with a slight delay (less than 1 μs) just after the upswing of the electric field, while counter-reorientation occurs with a delay time of a microsecond after the reverse of the electric field. The delay time for the counter-reorientation changes with temperature, indicating that the viscosity has a strong influence on the delay time. It is also indicated in the present study that the whole FLC molecule reorients simultaneously as a rigid rod in both the preliminary and the counter-reorientation process.

scholarly journals Design, optimization and realization of a ferroelectric liquid crystal based Mueller matrix ellipsometer using a genetic algorithm

2014 ◽  
Vol 571 ◽  
pp. 522-526 ◽  
Author(s):  
Lars Martin S. Aas ◽  
Daniel G. Skåre ◽  
Pål G. Ellingsen ◽  
Paul Anton Letnes ◽  
Morten Kildemo
Keyword(s):  
Genetic Algorithm ◽  
Liquid Crystal ◽  
Design Optimization ◽  
Mueller Matrix ◽  
Ferroelectric Liquid Crystal

Asynchronous Time-Resolved FT-IR Study of the Dynamical Behavior of Ferroelectric Liquid Crystal with a Tolane Ring

1997 ◽  
Vol 51 (4) ◽  
pp. 487-490 ◽  
Author(s):  
N. Katayama ◽  
M. A. Czarnecki ◽  
M. Satoh ◽  
T. Watanabe ◽  
Y. Ozaki
Keyword(s):  
Liquid Crystal ◽  
Tilt Angle ◽  
Dynamical Behavior ◽  
Ferroelectric Liquid Crystal ◽  
Experimental Conditions ◽  
Similar Time ◽  
Time Resolved ◽  
Intensity Changes ◽  
Ft Ir ◽  
Rigid Rod

Transient infrared spectra of a ferroelectric liquid crystal with a tolane ring, ( S)-4-methylhexyl-4-[4-(decyloxy)phenylethynyl]-2-fluorobenzate, in the smectic C phase have been measured under various temperatures and voltages by use of an asynchronous time-resolved FT-IR method. The effects of temperature and voltage on the rate and tilt angle of the electric field-induced reorientation of the molecule have been studied. The absolute values of the observed intensity changes and their sign during the switching can be explained by the static properties of the sample. The spectra obtained under the different experimental conditions suggest that the temperature and applied voltage alter the tilt angle and angular velocity of reorientation of the liquid crystal, respectively. Dominant infrared bands show very similar time-dependent intensity changes under various conditions, indicating that the whole molecule reorients simultaneously irrespective of temperature and the applied field strength as though the molecule were a rigid rod.

Time-resolved Mueller matrix analysis of a liquid crystal on silicon display

2008 ◽  
Vol 47 (23) ◽  
pp. 4267 ◽  
Author(s):  
Angel Lizana ◽  
Ignacio Moreno ◽  
Claudio Iemmi ◽  
Andrés Márquez ◽  
Juan Campos ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Mueller Matrix ◽  
Matrix Analysis ◽  
Time Resolved ◽  
Liquid Crystal On Silicon
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