Journal
OPTICS LETTERS
Volume 44, Issue 3, Pages 546-549Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.44.000546
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Funding
- Agence Nationale de la Recherche (ANR) [ANR-10-LABX-0039-PALM]
- French ASTRE program (NanoLight grant)
- Direction Generale de l'Armement (DGA) (2017 SWIM LASER grant)
- Laserlab-Europe [EU-H2020 654148]
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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. (C) 2019 Optical Society of America
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