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Article Dans Une Revue Optics Letters Année : 2017

Geometric phase shaping of terahertz vortex beams.

Résumé

We propose a topological beam-shaping strategy of terahertz (THz) beams using geometric phase elements made of space-variant birefringent slabs. Quasi-monochromatic THz vortex beams are produced and characterized both in amplitude and phase from the reconstructed real-time two-dimensional imaging of the electric field. Nonseparable superpositions of such vortex beams are also obtained and characterized by two-dimensional polarimetric analysis. These results emphasize the versatility of the spin-orbit electromagnetic toolbox to prepare on-demand structured light endowed with polarization-controlled orbital angular momentum content in the THz domain, which should find many uses in future THz technologies.
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hal-01452864 , version 1 (02-02-2017)

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Amalya Minasyan, Clément Trovato, Jérôme Degert, Eric Freysz, Etienne Brasselet, et al.. Geometric phase shaping of terahertz vortex beams.. Optics Letters, 2017, 42 (1), pp.41-44. ⟨10.1364/OL.42.000041⟩. ⟨hal-01452864⟩

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