RUFFATO, Gianluca; BRASSELET, Etienne; MASSARI, Michele; ROMANATO, Filippo

doi:10.1063/1.5030844

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RUFFATO, Gianluca
Dipartimento di Fisica e Astronomia "Galileo Galilei"
Laboratory for Nanofabrication of Nanodevices

BRASSELET, Etienne
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

MASSARI, Michele
Dipartimento di Fisica e Astronomia "Galileo Galilei"
Laboratory for Nanofabrication of Nanodevices

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Applied Physics Letters. 2018-07-02, vol. 113, n° 1, p. 011109 (1-5)

American Institute of Physics

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We present and test the integration of a static orbital angular momentum mode multiplexer with a dynamical geometric-phase optical element, enabling on-demand spin-controlled angular momentum multiplexing. A diffractive optic multiplexer fabricated by 3D high-resolution electron beam lithography performs a conformal mapping for the conversion from linear to azimuthal phase gradients. The latter is functionalized by a dynamic spin-orbit add-on that consists of a self-engineered electrically activated liquid crystal optical vortex generator having large clear-aperture and high-resolution. By combining several functionalities based on the optical angular momentum of light in a compact manner, the proposed hybrid device could find applications in next-generation high-dimensional mode switchers and routers based on orbital angular momentum.< Réduire

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Electrically activated spin-controlled orbital angular momentum multiplexer

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