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Article Dans Une Revue Nature Communications Année : 2024

Nonlinear spin-orbit coupling in optical thin films

Résumé

Abstract Tunable generation of vortex beams holds relevance in various fields, including communications and sensing. In this paper, we demonstrate the feasibility of nonlinear spin-orbit interactions in thin films of materials with second-order nonlinear susceptibility. Remarkably, the nonlinear tensor can mix the longitudinal and transverse components of the pump field. We observe experimentally our theoretical predictions in the process of second-harmonic generation from a thin film of aluminum gallium arsenide, a material platform widely spread for its role in the advancement of active, nonlinear, and quantum photonic devices. In particular, we prove that a nonlinear thin film can be used to produce vector vortex beams of second-harmonic light when excited by circularly-polarized Gaussian beams.

Dates et versions

hal-04475796 , version 1 (23-02-2024)

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Citer

Domenico de Ceglia, Laure Coudrat, Iännis Roland, Maria Antonietta Vincenti, Michael Scalora, et al.. Nonlinear spin-orbit coupling in optical thin films. Nature Communications, 2024, 15 (1), pp.1625. ⟨10.1038/s41467-024-45607-2⟩. ⟨hal-04475796⟩
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