BRASSELET, Etienne

doi:10.1364/OL.43.002623

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

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Optics Letters. 2018, vol. 43, n° 11, p. 2623-2626

Optical Society of America - OSA Publishing

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Geometric phase optical elements based on structured anisotropy are widely used for phase shaping via their orienta-tional degree of freedom. To date, amplitude shaping via space-variant retardance is much less investigated, a practical reason being that the spin-orbit interaction of light couples retardance with the dynamic part of the optical phase. Inspired by the complementary diffractive elements associated with Babinet's principle, a bilayered subwavelength grating design is proposed in order to cancel out the spatial modulation of the dynamic phase usually associated with space-variant birefringent phase retardation. This concept is illustrated in the framework of single-mode Laguerre Gauss –beam shaping.< Leer menos

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Laser beam shaping

Subwave length structures

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Babinet-bilayered geometric phase optical elements

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