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Taming the swirl of self-structured liquid crystal q-plates

Abstract : Spontaneously formed liquid crystal topological defects under external fields offer a nature-assisted route to the creation of geometric phase optical vortex generators (q-plates). Here we report on the consequences of the unavoidable swirled transverse spatial distribution of the optical axis of such optical elements on the beam shaping and we propose a swirl-compensation scheme based on the arithmetic of geometric phase optical elements.
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Nina Kravets, Etienne Brasselet. Taming the swirl of self-structured liquid crystal q-plates. Journal of Optics, Institute of Physics (IOP), 2020, Joint special issue on twisted waves and fiels, 22 (3), pp.034001. ⟨10.1088/2040-8986/ab6d8b⟩. ⟨hal-02468808⟩

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