Holographically generated twisted nematic liquid crystal gratings
- Department of Physics, Ewha Womans University, Seoul 120-750 (Korea, Republic of)
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.
- OSTI ID:
- 20778507
- Journal Information:
- Applied Physics Letters, Vol. 88, Issue 2; Other Information: DOI: 10.1063/1.2162672; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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