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Highly efficient twisted nematic liquid crystal polarization gratings achieved by microrubbing.
- Source :
-
Applied Physics Letters . 7/23/2012, Vol. 101 Issue 4, p041107-041107-4. 1p. 1 Diagram, 3 Graphs. - Publication Year :
- 2012
-
Abstract
- We demonstrate twisted nematic liquid crystal (LC) polarization gratings (TNPGs) with a high first-order diffraction efficiency (>90%) that have the twist angle as constant, whereas the azimuthal angle of the mid-plane liquid-crystal director varies linearly in space. The high diffraction-efficiency design scheme is derived by means of the Jones matrix method. The designed first-order diffraction efficiency theoretically reaches 100% for the thick LC layer in which the retardation equals (n + 1/2)λ (n is an integer and λ is the wavelength). We also present a simple model for the grating period- and twist angle-dependent threshold voltage of the Freedericksz transition in TNPGs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 101
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 78141276
- Full Text :
- https://doi.org/10.1063/1.4737945