Tunable liquid crystal q-plates with arbitrary topological charge

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Slussarenko, Sergei
Murauski, Anatoli
Du, Tao
Chigrinov, Vladimir
Marrucci, Lorenzo
Santamato, Enrico
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2011
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Abstract

Using a photoalignment technique with a sulphonic azo-dye as the surfactant aligning material, we fabricated electrically tunable liquid crystal q-plates with topological charge 0.5, 1.5 and 3 for generating optical vortex beams with definite orbital angular momentum (OAM) 1,3 and 6 per photon (in units of h𤋮 respectively. We carried out several tests on our q-plates, including OAM tomography, finding excellent performances. These devices can have useful applications in general and quantum optics.

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Optics Express

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19

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5

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© 2011 OSA. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.19.004085. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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Atomic, molecular and optical physics

Photonics, optoelectronics and optical communications

Atomic, molecular and optical physics not elsewhere classified

Quantum optics and quantum optomechanics

Communications engineering

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