Optical vortices from closed-loop subwavelength slits

Etienne Brasselet (1)

1 LOMA - Laboratoire Ondes et Matière d'Aquitaine

We report on the singular shaping of light using closed-loop subwavelength slits whose shape is homeomorphic to the circle. Various sets of optical phase singularities can be generated depending on the given closed path whose geometry tailors the spin-orbit interaction for the light that passes through the curved slit. Here three families of closed-loop curves are considered--polygons, hypocycloids, and epicycloids.

Mots clés: Optical vortices; Form birefringence; Subwavelength structures & nanostructures

Domaines: Optique [physics.optics]

Etienne Brasselet. Optical vortices from closed-loop subwavelength slits. Optics Letters, 2013, 38 (14), pp.2575-2577. ⟨10.1364/OL.38.002575⟩. ⟨hal-00845500⟩