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Article Dans Une Revue APL Photonics Année : 2023

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
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Dates et versions

hal-04258244 , version 1 (25-10-2023)

Identifiants

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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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