Holographically generated twisted nematic liquid crystal gratings

Hyunhee Choi, J. W. Wu, Hye Jeong Chang, Byoungchoo Park

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34 Scopus citations


A reflection holographic method is introduced to fabricate an electro-optically tunable twisted nematic (TN) liquid crystal (LC) grating, forgoing the geometrical drawing. The photoisomerization process occurring on the LC alignment layers of an LC cell in the reflection holographic configuration gives a control over the twist angle, and the grating spacing is determined by the slant angle of reflection holographic configuration. The resulting diffraction grating is in a structure of a reverse TN LC, permitting a polarization-independent diffraction efficiency. The electro-optic tunability of the diffraction efficiency is also demonstrated.

Original languageEnglish
Article number021905
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number2
StatePublished - 2006

Bibliographical note

Funding Information:
This work is supported by ABRL program at Ewha Womans University as well as by Korea Research Foundations (Grant No. 2004-C00057).


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