Article Dans Une Revue Optics Express Année : 2025

High efficiency second harmonic generation in transverse orientation patterned gallium phosphide waveguides

Résumé

Achieving high conversion efficiencies in second-order nonlinear optical processes is a key challenge in integrated photonics for both classical and quantum applications. This paper presents what we believe is the first demonstration of transverse orientation-patterned gallium phosphide (TOP-GaP) waveguides showing high-efficiency second harmonic generation. In such devices, first-order modal phase matching is unlocked and optimized through the inversion of the nonlinear susceptibility along the vertical direction. We discuss here the theory behind modal phase matching in TOP structures, describe the fabrication process, and present linear and nonlinear characterizations of the TOP-GaP waveguides.

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Dates et versions

hal-05223377 , version 1 (26-08-2025)
hal-05223377 , version 2 (06-01-2026)

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Antoine Lemoine, Brieg Le Corre, Lise Morice, Abdelmounaïm Harouri, Luc Le Gratiet, et al.. High efficiency second harmonic generation in transverse orientation patterned gallium phosphide waveguides. Optics Express, 2025, 33 (14), pp.29239. ⟨10.1364/OE.557556⟩. ⟨hal-05223377v1⟩
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