Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant

P. Witte, van de, E.E. Neuteboom, M. Brehmer, Johan Lub

Research output: Contribution to journalArticleAcademicpeer-review

38 Citations (Scopus)

Abstract

A method for the production of polarization sensitive recordings in liquid crystalline polymers is presented. The system is based on local modification of the twist angle of chiral nematic polymer films. The twist angle of the polymer film is varied by modifying the chemical structure of the chiral dopant. Here a photoisomerizable menthone derivative is used that has a fivefold difference in helical twisting power between the E and the Z isomer. The twist angle of the film can be varied between –90° and 0° by introducing a nonphotosensitive chiral dopant with opposite twisting sense. Complex pictures with gray scales can be recorded in the films with black and white contrasts higher than 20.
LanguageEnglish
Pages7517-7521
JournalJournal of Applied Physics
Volume85
Issue number11
DOIs
StatePublished - 1999

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polymers
twisting
gray scale
isomers
recording
polarization
liquids

Cite this

Witte, van de, P. ; Neuteboom, E.E. ; Brehmer, M. ; Lub, Johan. / Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant. In: Journal of Applied Physics. 1999 ; Vol. 85, No. 11. pp. 7517-7521
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abstract = "A method for the production of polarization sensitive recordings in liquid crystalline polymers is presented. The system is based on local modification of the twist angle of chiral nematic polymer films. The twist angle of the polymer film is varied by modifying the chemical structure of the chiral dopant. Here a photoisomerizable menthone derivative is used that has a fivefold difference in helical twisting power between the E and the Z isomer. The twist angle of the film can be varied between –90° and 0° by introducing a nonphotosensitive chiral dopant with opposite twisting sense. Complex pictures with gray scales can be recorded in the films with black and white contrasts higher than 20.",
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Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant. / Witte, van de, P.; Neuteboom, E.E.; Brehmer, M.; Lub, Johan.

In: Journal of Applied Physics, Vol. 85, No. 11, 1999, p. 7517-7521.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Modification of the twist angle in chiral nematic polymer films by photoisomerization of the chiral dopant

AU - Witte, van de,P.

AU - Neuteboom,E.E.

AU - Brehmer,M.

AU - Lub,Johan

PY - 1999

Y1 - 1999

N2 - A method for the production of polarization sensitive recordings in liquid crystalline polymers is presented. The system is based on local modification of the twist angle of chiral nematic polymer films. The twist angle of the polymer film is varied by modifying the chemical structure of the chiral dopant. Here a photoisomerizable menthone derivative is used that has a fivefold difference in helical twisting power between the E and the Z isomer. The twist angle of the film can be varied between –90° and 0° by introducing a nonphotosensitive chiral dopant with opposite twisting sense. Complex pictures with gray scales can be recorded in the films with black and white contrasts higher than 20.

AB - A method for the production of polarization sensitive recordings in liquid crystalline polymers is presented. The system is based on local modification of the twist angle of chiral nematic polymer films. The twist angle of the polymer film is varied by modifying the chemical structure of the chiral dopant. Here a photoisomerizable menthone derivative is used that has a fivefold difference in helical twisting power between the E and the Z isomer. The twist angle of the film can be varied between –90° and 0° by introducing a nonphotosensitive chiral dopant with opposite twisting sense. Complex pictures with gray scales can be recorded in the films with black and white contrasts higher than 20.

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DO - 10.1063/1.370548

M3 - Article

VL - 85

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JO - Journal of Applied Physics

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