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Optical behavior and switching of vertically aligned nematic liquid crystals

Pieter Vanbrabant UGent (2011)
abstract
In this work, the electro-optical behavior of liquid crystal devices is studied both theoretically and experimentally. In particular, attention has been devoted to the study of vertically aligned (VA) devices as they are one of the most attractive technologies for display applications because of their excellent contrast ratio. The hydrodynamic behavior of VA devices has been studied in this work by means of experiments and simulations. The material influence on the occurrence of reverse flow has been illustrated. It is shown that the threshold voltage for the onset of backflow is a material characteristic. Modeling the electro-optical behavior of liquid crystal devices with micrometer-scale variations involves two aspects. The first step is to determine the orientation of the liquid crystal for the considered geometry in e.g. the presence of an electric field (in the static or dynamic case). The second challenge is to calculate the light propagation through the structure once the director profile of the liquid crystal is known. For this purpose, a finite element beam propagation method (BPM) for the optical analysis of liquid crystal devices has been developed which is fully compatible with the existing liquid crystal modeling software developed at University College London. The finite element tools have been applied to model the electro-optical behavior of liquid crystal (micro)displays and tunable photonic components based on liquid crystals such as waveguides and couplers.
Please use this url to cite or link to this publication:
author
promoter
UGent and UGent
organization
alternative title
Optische eigenschappen en schakelgedrag van verticaal gealigneerde vloeibare kristallen
year
type
dissertation (monograph)
subject
pages
XXXII, 155 pages
publisher
Ghent University. Faculty of Engineering and Architecture
place of publication
Ghent, Belgium
defense location
Gent : Faculteit Ingenieurswetenschappen en Architectuur (Jozef Plateauzaal)
defense date
2011-02-14 10:30
ISBN
9789085784050
language
English
UGent publication?
yes
classification
D1
additional info
dissertation in part contains copyrighted material
copyright statement
I have transferred the copyright for this publication to the publisher
id
1156947
handle
http://hdl.handle.net/1854/LU-1156947
date created
2011-02-21 09:28:45
date last changed
2011-04-11 13:24:49
@phdthesis{1156947,
  abstract     = {In this work, the electro-optical behavior of liquid crystal devices is studied both theoretically and experimentally. In particular, attention has been devoted to the study of vertically aligned (VA) devices as they are one of the most attractive technologies for display applications because of their excellent contrast ratio.
The hydrodynamic behavior of VA devices has been studied in this work by means of experiments and simulations. The material influence on the occurrence of reverse flow has been illustrated. It is shown that the threshold voltage for the onset of backflow is a material characteristic.
Modeling the electro-optical behavior of liquid crystal devices with micrometer-scale variations involves two aspects. The first step is to determine the orientation of the liquid crystal for the considered geometry in e.g. the presence of an electric field (in the static or dynamic case). The second challenge is to calculate the light propagation through the structure once the director profile of the liquid crystal is known. For this purpose, a finite element beam propagation method (BPM) for the optical analysis of liquid crystal devices has been developed which is fully compatible with the existing liquid crystal modeling software developed at University College London. The finite element tools have been applied to model the electro-optical behavior of liquid crystal (micro)displays and tunable photonic components based on liquid crystals such as waveguides and couplers.},
  author       = {Vanbrabant, Pieter},
  isbn         = {9789085784050},
  language     = {eng},
  pages        = {XXXII, 155},
  publisher    = {Ghent University. Faculty of Engineering and Architecture},
  school       = {Ghent University},
  title        = {Optical behavior and switching of vertically aligned nematic liquid crystals},
  year         = {2011},
}

Chicago
Vanbrabant, Pieter. 2011. “Optical Behavior and Switching of Vertically Aligned Nematic Liquid Crystals”. Ghent, Belgium: Ghent University. Faculty of Engineering and Architecture.
APA
Vanbrabant, P. (2011). Optical behavior and switching of vertically aligned nematic liquid crystals. Ghent University. Faculty of Engineering and Architecture, Ghent, Belgium.
Vancouver
1.
Vanbrabant P. Optical behavior and switching of vertically aligned nematic liquid crystals. [Ghent, Belgium]: Ghent University. Faculty of Engineering and Architecture; 2011.
MLA
Vanbrabant, Pieter. “Optical Behavior and Switching of Vertically Aligned Nematic Liquid Crystals.” 2011 : n. pag. Print.