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Journal Articles Optics Letters Year : 2019

Orbital angular momentum from semiconductor high-order harmonics

Abstract

Light beams carrying orbital angular momentum (OAM) have led to stunning applications in various fields from quantum information to microscopy. We examine OAM from the recently observed high-harmonic generation (HHG) in semiconductor crystals. HHG from solids could be a valuable approach for integrated high-flux short-wavelength coherent light sources. First, we verify the transfer and conservation of the OAM in the strong-field regime of interaction from the generation laser to the harmonics. Secondly, we create OAM beams by etching a spiral zone structure directly at the surface of a zinc oxide crystal. Such diffractive optics act on the generated harmonics and produces focused optical vortices with sub-micrometric size.

Dates and versions

cea-02096291 , version 1 (11-04-2019)

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David Gauthier, Shatha Kaassamani, Dominik Franz, Rana Nicolas, Jean-Thomas Gomes, et al.. Orbital angular momentum from semiconductor high-order harmonics. Optics Letters, 2019, 44 (3), pp.546. ⟨10.1364/OL.44.000546⟩. ⟨cea-02096291⟩
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