Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal

S. M. Morris; M. M. Qasim; K. T. Cheng; F. Castles; D. H. Ko; D. J. Gardiner; S. Nosheen; T. D. Wilkinson; H. J. Coles; C. Burgess; L. Hill

doi:10.1063/1.4818679

Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal

S. M. Morris, M. M. Qasim, K. T. Cheng, F. Castles, D. H. Ko, D. J. Gardiner, S. Nosheen, T. D. Wilkinson, H. J. Coles, C. Burgess, L. Hill

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

We report the demonstration of an optically activated shutter based upon a short-pitch chiral nematic liquid crystal (LC) device sandwiched between crossed polarizers. This LC is comprised of photo-active chiral dopants. In the trans-state, the LC appears dark between crossed polarizers due to the very short pitch. As the pitch is extended through exposure to ultraviolet light, the device becomes transmissive reaching a maximum for a particular value of the pitch. As a result, it is possible to switch between the light and dark states by subjecting the device to visible light so as to cause a cis-trans photo-isomerisation.

Original language	English
Article number	101105
Journal	Applied Physics Letters
Volume	103
Issue number	10
DOIs	https://doi.org/10.1063/1.4818679
State	Published - 2 Sep 2013
Externally published	Yes

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title = "Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal",

abstract = "We report the demonstration of an optically activated shutter based upon a short-pitch chiral nematic liquid crystal (LC) device sandwiched between crossed polarizers. This LC is comprised of photo-active chiral dopants. In the trans-state, the LC appears dark between crossed polarizers due to the very short pitch. As the pitch is extended through exposure to ultraviolet light, the device becomes transmissive reaching a maximum for a particular value of the pitch. As a result, it is possible to switch between the light and dark states by subjecting the device to visible light so as to cause a cis-trans photo-isomerisation.",

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doi = "10.1063/1.4818679",

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T1 - Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal

AU - Morris, S. M.

AU - Qasim, M. M.

AU - Cheng, K. T.

AU - Castles, F.

AU - Ko, D. H.

AU - Gardiner, D. J.

AU - Nosheen, S.

AU - Wilkinson, T. D.

AU - Coles, H. J.

AU - Burgess, C.

AU - Hill, L.

PY - 2013/9/2

Y1 - 2013/9/2

N2 - We report the demonstration of an optically activated shutter based upon a short-pitch chiral nematic liquid crystal (LC) device sandwiched between crossed polarizers. This LC is comprised of photo-active chiral dopants. In the trans-state, the LC appears dark between crossed polarizers due to the very short pitch. As the pitch is extended through exposure to ultraviolet light, the device becomes transmissive reaching a maximum for a particular value of the pitch. As a result, it is possible to switch between the light and dark states by subjecting the device to visible light so as to cause a cis-trans photo-isomerisation.

AB - We report the demonstration of an optically activated shutter based upon a short-pitch chiral nematic liquid crystal (LC) device sandwiched between crossed polarizers. This LC is comprised of photo-active chiral dopants. In the trans-state, the LC appears dark between crossed polarizers due to the very short pitch. As the pitch is extended through exposure to ultraviolet light, the device becomes transmissive reaching a maximum for a particular value of the pitch. As a result, it is possible to switch between the light and dark states by subjecting the device to visible light so as to cause a cis-trans photo-isomerisation.

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DO - 10.1063/1.4818679

M3 - Article

AN - SCOPUS:84884228721

SN - 0003-6951

VL - 103

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 10

M1 - 101105

ER -

Optically activated shutter using a photo-tunable short-pitch chiral nematic liquid crystal

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