3D structured Bessel beam polarization and its application to imprint chiral optical properties in silica
Résumé
Polarization plays a crucial role in light–matter interactions;
hence its overall manipulation is an essential key to unlock the
versatility of light manufacturing, especially in femtosecond laser
direct writing. Existing polarization-shaping techniques, however,
only focus on their manipulation in the transverse plane of light
beams, i.e., two-dimensional control. In this paper, we propose a
novel passive strategy that exploits a class of femtosecond laser
written space varying birefringent elements to shape the
polarization state along the optical path. As a demonstration, we
generate a three-dimensional structured Bessel beam whose linear
polarization state slowly evolves along the focus (typ. 90° within
60λ). Such a “helically polarized” Bessel beam allows imprinting
“twisted nanogratings” in SiO
Domaines
Optique [physics.optics]
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Soumis le : mercredi 25 octobre 2023-14:20:18
Dernière modification le : jeudi 11 avril 2024-13:08:15
Archivage à long terme le : vendredi 26 janvier 2024-19:19:45
Citer
Jiafeng Lu, Mostafa Hassan, François Courvoisier, Enrique Garcia-Caurel, François Brisset, et al.. 3D structured Bessel beam polarization and its application to imprint chiral optical properties in silica. APL Photonics, 2023, 8, pp.060801 (1-10). ⟨10.1063/5.0140843⟩. ⟨hal-04258244⟩
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