Structure of the dielectric tensor in nematic liquid crystals with topological charge



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Martínez Matos, Óscar and Vaveliuk, Pablo and Moraes, Fernando Jorge Sampaio and Fumeron, Sebastien and Calvo Padilla, María Luisa (2010) Structure of the dielectric tensor in nematic liquid crystals with topological charge. Journal of The Optical Society Of America A-Optics Image Science and Vision, 27 (6). pp. 1466-1472. ISSN 1084-7529

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A q-plate is a stratified medium composed of a uniaxial nematic liquid crystal with an inhomogeneous orientation of the optical axis possessing a topological charge q, which looks promising as a switching device. This work reports an approach to diagonalizing the dielectric tensor in q-plates, giving a detailed study of nontrivial tensor coordinate transformations. The relationship between the diagonal dielectric tensor and the topological charge of the plate is established. From that, the dielectric tensor for a given q-plate can be explicitly calculated in a convenient frame, and hence the field propagation equations can be derived. These studies establish a theoretical basis that could further deepen the research on these particular structures for nonconventional manipulation of the light.

Item Type:Article
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© 2010 Optical Society of America.
P. V. and F. M. acknowledge financial support from CNPq (Brazilian federal grant agency). The partial financial support of the Spanish Ministry of Innovation and Science, under project TEC2008-04105is acknowledged.

Uncontrolled Keywords:Laser-Beams, Phase, Manipulation, Propagation, Light
Subjects:Sciences > Physics > Optics
ID Code:25149
Deposited On:24 Apr 2014 08:16
Last Modified:24 Apr 2014 08:16

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