Optical torque reversal and spin-orbit rotational Doppler shift experiments.

Davit Hakobyan (1) , Etienne Brasselet (1)

1 LOMA - Laboratoire Ondes et Matière d'Aquitaine

We report on optical rotational Doppler frequency shift experiments in the context of a counter-intuitive optomechanical phenomenon that is the angular analog of so-called negative optical radiation forces, which involves spin-orbit scattering of light. In practice, spin-orbit opto-mechanical effects arising from the interaction between polarized light and azimuthally varying birefringent optical elements are retrieved from mechano-optical experiments that involve spatial of the medium. Two kinds of experiments (single-beam and two-beam geometries) are performed and both approaches are discussed in the framework of previous dynamical geometric phase and rotational Doppler shift experiments based on spin and/or orbital angular momentum of light.

Mots clés: Optomechanics; Optical vortices; Form birefringence; Subwave length structures; Nanostructures

Domaines: Optique [physics.optics]

Davit Hakobyan, Etienne Brasselet. Optical torque reversal and spin-orbit rotational Doppler shift experiments.. Optics Express, 2015, 23 (24), pp.31230-9. ⟨10.1364/OE.23.031230⟩. ⟨hal-01256744⟩