Difference frequency generation in optically poled silicon nitride waveguides

Ezgi Sahin; Boris Zabelich; Ozan Yakar; Edgars Nitiss; Camille-Sophie Brès

doi:10.1117/12.2582060

5 March 2021 Difference frequency generation in optically poled silicon nitride waveguides

Ezgi Sahin, Boris Zabelich, Ozan Yakar, Edgars Nitiss, Camille-Sophie Brès

Proceedings Volume 11689, Integrated Optics: Devices, Materials, and Technologies XXV; 1168917 (2021) https://doi.org/10.1117/12.2582060
Event: SPIE OPTO, 2021, Online Only

Abstract

All-optical poling leads to an effective second-order nonlinearity (χ⁽²⁾) in centrosymmetric materials without the need for sophisticated fabrication techniques or material processing, through the periodic self-organization of the charges. The absence of the inherent χ⁽²⁾ in prevailing silicon-based platforms can be surmounted through all-optical poling. Using the induced effective χ⁽²⁾ in silicon nitride (Si₃N₄) waveguides, nonlinear frequency up-conversion processes, such as second-harmonic generation, were previously demonstrated on Si₃N₄. Here, we report near- and non-degenerate difference-frequency generation in all-optically poled Si₃N₄ waveguides. We show the agreement between the theory and the measurements and optimize achievable QPM bandwidth range, reaching conversion efficiency of 1 %/W.

Conference Presentation

Citation Download Citation

Ezgi Sahin, Boris Zabelich, Ozan Yakar, Edgars Nitiss, and Camille-Sophie Brès "Difference frequency generation in optically poled silicon nitride waveguides", Proc. SPIE 11689, Integrated Optics: Devices, Materials, and Technologies XXV, 1168917 (5 March 2021); https://doi.org/10.1117/12.2582060

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