Directed Metalation Route to Ferroelectric Liquid Crystals with a Chiral Fluorenol Core:  The Effect of Restricted Rotation on Polar Order

2004 ◽  
Vol 126 (4) ◽  
pp. 1161-1167 ◽  
Author(s):  
J. Adam McCubbin ◽  
Xia Tong ◽  
Ruiyao Wang ◽  
Yue Zhao ◽  
Victor Snieckus ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Polar Order ◽  
Restricted Rotation

scholarly journals Development of tilt, biaxiality and polar order in bent-core liquid crystals derived from 4′-hydroxybiphenyl-3-carboxylic acid

2015 ◽  
Vol 3 (17) ◽  
pp. 4269-4282 ◽  
Author(s):  
Dilek Güzeller ◽  
Hale Ocak ◽  
Belkız Bilgin-Eran ◽  
Marko Prehm ◽  
Carsten Tschierske
Keyword(s):  
Liquid Crystals ◽  
Carboxylic Acid ◽  
Steric Effects ◽  
Polar Order ◽  
Restricted Rotation

A series of six distinct LC phases is formed by competition between emerging tilt, restricted rotation and steric effects.

Design and synthesis of ferroelectric liquid crystals. 24. Incorporation of the disperse red 1 chromophqre into side-by-side dimers for nonlinear optics

1995 ◽  
Vol 413 ◽  
Author(s):  
Daniel J. Dyer ◽  
Renfan Shao ◽  
Noel A. Clark ◽  
David M. Walba
Keyword(s):  
Liquid Crystals ◽  
Integrated Circuits ◽  
Supermolecular Structure ◽  
Polar Axis ◽  
Nonlinear Susceptibility ◽  
Ferroelectric Liquid Crystals ◽  
Structural Class ◽  
Polar Order ◽  
Design And Synthesis ◽  
Smectic C

ABSTRACTWith excellent processibility on silicon integrated circuits and thermodynamically stable polar order, ferroelectric liquid crystals (FLCs) show great potential as components of fast integrated electro-optic modulators. In order to realize this potential, however, an increase in the magnitude of the electronic secona order nonlinear susceptibility χ(2) is required. This has been problematical since functional arrays with large molecular second order susceptibility β orient with improper supermolecular stereocontrol (i.e. with the charge transfer axis normal to the polar axis) when incorporated into traditional FLC structures. Herein we present examples of a new LC structural class designed to achieve the proper supermolecular structure for large χ(2) in FLCs. The observed sign and magnitude of the ferroelectric polarization of the new mesogens extrapolated from smectic C* mixtures is fully consistent with the desired supermolecular structure.

Technique for Measuring Electronic-Based Electro-Optic Coefficients of Ferroelectric Liquid Crystals

1995 ◽  
Vol 392 ◽  
Author(s):  
Kenneth E. Arnett ◽  
David M. Walba ◽  
Joel A. Drewes
Keyword(s):  
Liquid Crystals ◽  
Optical Materials ◽  
Nonlinear Optical ◽  
Broad Band ◽  
Nonlinear Optical Materials ◽  
Nonlinear Susceptibility ◽  
Ferroelectric Liquid Crystals ◽  
Polar Order ◽  
Electro Optic ◽  
Coefficient Measurement

AbstractAmong soft organic nonlinear optical materials is a class of recently developed: χ(2)_ enhanced ferroelectric liquid crystals (FLCs). The FLC phase nonlinear susceptibility is enhanced by synthesizing onto the molecules constituting the FLC phase a moiety with an increased hyperpolarizability. The hyperpolarizability of the FLC molecules couples into the permanent, thermodynamically stable, polar order of the FLC phase resulting in a material with an enhanced nonlinear susceptibility. Like other soft organics, the linear and nonlinear optical materials characteristics can be altered by chemical synthesis and mixing.We report on our technique to evaluate the nonlinear optical properties of χ(2)-enhanced FLCs by measuring their high-frequency electro-optic r-coefficients. The technique is broad-band, readily allowing electro-optic coefficient measurement between 100 KHz and 200 MHz. Although the experimental geometry is not conducive for practical device application, it offers a compromise between ease of fabrication and magnitude of nonlinear response. This technique can also be used to evaluate other organic materials such as poled polymers.

Evidence of two new ordered smectic phases in ferroelectric liquid crystals

1978 ◽  
Vol 39 (5) ◽  
pp. 548-553 ◽  
Author(s):  
J. Doucet ◽  
P. Keller ◽  
A.M. Levelut ◽  
P. Porquet
Keyword(s):  
Liquid Crystals ◽  
Ferroelectric Liquid Crystals ◽  
Smectic Phases

Second-order NLO response in chiral ferroelectric liquid crystals: Molecular and bulk consideration

2021 ◽  
pp. 115328
Author(s):  
Stijn van Cleuvenbergen ◽  
Griet Depotter ◽  
Koen Clays ◽  
Przemysław Kędziora
Keyword(s):  
Liquid Crystals ◽  
Second Order ◽  
Ferroelectric Liquid Crystals ◽  
Nlo Response

Tilt-polarization coupling in a homologous series of ferroelectric liquid crystals

1998 ◽  
Vol 8 (3) ◽  
pp. 603-612 ◽  
Author(s):  
Jochen Schacht ◽  
Heike Baethge ◽  
Frank Giesselmann ◽  
Peter Zugenmaier
Keyword(s):  
Liquid Crystals ◽  
Homologous Series ◽  
Ferroelectric Liquid Crystals
Sign in / Sign up

Export Citation Format

Share Document