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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.
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https://hal-cea.archives-ouvertes.fr/cea-02096291
Contributor : Caroline Lebe <>
Submitted on : Thursday, April 11, 2019 - 11:30:51 AM
Last modification on : Wednesday, September 16, 2020 - 5:48:25 PM

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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, Optical Society of America, 2019, 44 (3), pp.546. ⟨10.1364/OL.44.000546⟩. ⟨cea-02096291⟩

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