Photon spin-to-orbital angular momentum conversion via an electrically tunable $q$-plate

Details Photon spin-to-orbital angular momentum conversion via an electrically tunable $q$-plate Photon spin-to-orbital angular momentum conversion via an electrically tunable $q$-plate

2010-10-21

arxiv.org/abs/1010.4473v1

Applied Physics Letters 97, 241104 (2010)

Physics

Optics

4 pages, 5 figures, submitted

Scientific paper

10.1063/1.3527083

Exploiting electro-optic effects in liquid crystals, we achieved real-time control of the retardation of liquid- crystal-based $q$-plates through an externally applied voltage. The newly conceived electro-optic $q$-plates can be operated as electrically driven converters of photon spin into orbital angular momentum, enabling a variation of the orbital angular momentum probabilities of the output photons over a time scale of milliseconds.

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