AGEZ, Gonzague; BRASSELET, Etienne

doi:10.1364/OPTICA.450832

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AGEZ, Gonzague
Nano-Optique et Nanomatériaux pour l'optique [CEMES-NeO]

BRASSELET, Etienne
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

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Article de revue

Ce document a été publié dans

Optica. 2022, vol. 9, n° 6, p. 652

Optical Society of America - OSA Publishing

Résumé en anglais

Spin–orbit photonic devices usually rely on 2D (transverse) material structuring and are designed for optimal coupling between the polarization state and the spatial degrees of freedom at a given wavelength. Exploiting the third dimension (longitudinal) provides ways to bypass monochromatic limitations. Within a singular optics framework, here we show that chiral liquid crystals endowed with non-singular 3D helix axis orientational distribution exhibit transmissive broadband spin–orbit optical vortex generation as well as an optical diode effect. These results are in stark contrast to the properties of spin–orbit optical elements fabricated from chiral liquid crystals with a uniform orientation of the helix axis, which are reflective devices that process forward and backward propagating waves equally. Moreover, the similarities between the proposed 3D chiral structure and that of the cuticle of some insects invites considering spin–orbit photonics from a biological perspective.< Réduire

DOI

http://dx.doi.org/10.1364/OPTICA.450832

Project ANR

Université Fédérale de Toulouse - ANR-11-IDEX-0002
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

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Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798