High efficiency second harmonic generation in transverse orientation patterned gallium phosphide waveguides
Antoine Lemoine, Brieg Le Corre, Lise Morice, Abdelmouna\"im Harouri, Luc Le Gratiet, Gr\'egoire Beaudoin, Julie Le Pouliquen, Karine Tavernier, Arnaud Grisard, Sylvain Combri\'e, Bruno G\'erard, Charles Cornet, Yannick Dumeige, Konstantinos Pantzas, Isabelle Sagnes, Yoan L\'eger
TL;DR
This paper demonstrates high-efficiency second harmonic generation in transverse orientation-patterned gallium phosphide waveguides, advancing integrated nonlinear photonics by enabling optimized modal phase matching.
Contribution
First demonstration of TOP-GaP waveguides achieving high SHG efficiency through novel modal phase matching techniques.
Findings
Successful fabrication of TOP-GaP waveguides
Effective modal phase matching achieved
High SHG conversion efficiency demonstrated
Abstract
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 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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Taxonomy
TopicsPhotonic and Optical Devices · Advanced Fiber Laser Technologies · Photorefractive and Nonlinear Optics