Home > Research > Publications & Outputs > The magnitude and temperature dependence of the...

Associated organisational unit

View graph of relations

The magnitude and temperature dependence of the Kerr constant in liquid crystal blue phases and the dark conglomerate phase

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

The magnitude and temperature dependence of the Kerr constant in liquid crystal blue phases and the dark conglomerate phase. / Tian, Linan; Goodby, John W.; Görtz, Verena et al.
In: Liquid Crystals, Vol. 40, No. 11, 2013, p. 1446-1454.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

APA

Vancouver

Tian L, Goodby JW, Görtz V, Gleeson HF. The magnitude and temperature dependence of the Kerr constant in liquid crystal blue phases and the dark conglomerate phase. Liquid Crystals. 2013;40(11):1446-1454. Epub 2013 Sept 17. doi: 10.1080/02678292.2013.836253

Author

Tian, Linan ; Goodby, John W. ; Görtz, Verena et al. / The magnitude and temperature dependence of the Kerr constant in liquid crystal blue phases and the dark conglomerate phase. In: Liquid Crystals. 2013 ; Vol. 40, No. 11. pp. 1446-1454.

Bibtex

@article{5e5d045858dd45c9a1ceea796de7cd7d,
title = "The magnitude and temperature dependence of the Kerr constant in liquid crystal blue phases and the dark conglomerate phase",
abstract = "A new method of evaluating the Kerr constant in liquid crystals (LCs) is used to determine the temperature dependence of the Kerr effect in blue phases I and II (BPI and BPII) and to investigate the Kerr constant of the isotropic dark conglomerate (DC) phase. This method employs relatively small driving voltages and a vertical field switching (VFS) device geometry. An unusually large Kerr constant, K, is determined in the BPs of a non-polymer-stabilised material, 3×10−9 mV−2 (BPI). The large value of K is attributed to significant pre-transitional values of the dielectric anisotropy and birefringence. K follows an inverse dependence on temperature and we consequently suggest that BPI demonstrates properties best suited to electro-optic devices. The new methodology has the advantage of revealing the dispersion of K in a single measurement. It is also possible to deconvolute the influence of the Kerr effect from measurements of electrostriction of the BP lattice. Finally, the Kerr effect has been measured for the first time in the DC phase of an oxadiazole bent-core liquid crystalline material, and is found to take rather low values, 1×10−11 mV−2, which can be understood in the context of the physical properties of the material.",
keywords = "Kerr effect, blue phase, electrostriction, dark conglomerate phase",
author = "Linan Tian and Goodby, {John W.} and Verena G{\"o}rtz and Gleeson, {Helen F.}",
year = "2013",
doi = "10.1080/02678292.2013.836253",
language = "English",
volume = "40",
pages = "1446--1454",
journal = "Liquid Crystals",
issn = "0267-8292",
publisher = "Taylor and Francis Ltd.",
number = "11",

}

RIS

TY - JOUR

T1 - The magnitude and temperature dependence of the Kerr constant in liquid crystal blue phases and the dark conglomerate phase

AU - Tian, Linan

AU - Goodby, John W.

AU - Görtz, Verena

AU - Gleeson, Helen F.

PY - 2013

Y1 - 2013

N2 - A new method of evaluating the Kerr constant in liquid crystals (LCs) is used to determine the temperature dependence of the Kerr effect in blue phases I and II (BPI and BPII) and to investigate the Kerr constant of the isotropic dark conglomerate (DC) phase. This method employs relatively small driving voltages and a vertical field switching (VFS) device geometry. An unusually large Kerr constant, K, is determined in the BPs of a non-polymer-stabilised material, 3×10−9 mV−2 (BPI). The large value of K is attributed to significant pre-transitional values of the dielectric anisotropy and birefringence. K follows an inverse dependence on temperature and we consequently suggest that BPI demonstrates properties best suited to electro-optic devices. The new methodology has the advantage of revealing the dispersion of K in a single measurement. It is also possible to deconvolute the influence of the Kerr effect from measurements of electrostriction of the BP lattice. Finally, the Kerr effect has been measured for the first time in the DC phase of an oxadiazole bent-core liquid crystalline material, and is found to take rather low values, 1×10−11 mV−2, which can be understood in the context of the physical properties of the material.

AB - A new method of evaluating the Kerr constant in liquid crystals (LCs) is used to determine the temperature dependence of the Kerr effect in blue phases I and II (BPI and BPII) and to investigate the Kerr constant of the isotropic dark conglomerate (DC) phase. This method employs relatively small driving voltages and a vertical field switching (VFS) device geometry. An unusually large Kerr constant, K, is determined in the BPs of a non-polymer-stabilised material, 3×10−9 mV−2 (BPI). The large value of K is attributed to significant pre-transitional values of the dielectric anisotropy and birefringence. K follows an inverse dependence on temperature and we consequently suggest that BPI demonstrates properties best suited to electro-optic devices. The new methodology has the advantage of revealing the dispersion of K in a single measurement. It is also possible to deconvolute the influence of the Kerr effect from measurements of electrostriction of the BP lattice. Finally, the Kerr effect has been measured for the first time in the DC phase of an oxadiazole bent-core liquid crystalline material, and is found to take rather low values, 1×10−11 mV−2, which can be understood in the context of the physical properties of the material.

KW - Kerr effect

KW - blue phase

KW - electrostriction

KW - dark conglomerate phase

U2 - 10.1080/02678292.2013.836253

DO - 10.1080/02678292.2013.836253

M3 - Journal article

VL - 40

SP - 1446

EP - 1454

JO - Liquid Crystals

JF - Liquid Crystals

SN - 0267-8292

IS - 11

ER -