Brillouin and Kerr nonlinearities of a low-index silicon oxynitride platform

Kaixuan Ye, Yvan Klaver, Oscar A. Jimenez Gordillo, Roel Botter, Okky Daulay, Francesco Morichetti, Andrea Melloni, David Marpaung*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Nonlinear optical effects including stimulated Brillouin scattering (SBS) and four-wave mixing (FWM) play an important role in microwave photonics, optical frequency combs, and quantum photonics. Harnessing SBS and FWM in a low-loss and versatile integrated platform would open the path to build large-scale Brillouin/Kerr-based photonic integrated circuits. In this letter, we investigate the Brillouin and Kerr properties of a low-index (n = 1.513 @ 1550 nm) silicon oxynitride (SiON) platform. We observed, for the first time, backward Brillouin scattering in SiON waveguides with a Brillouin gain coefficient of 0.3 m −1 W −1, which can potentially be increased to 0.95 m −1 W −1 by just tailoring the waveguide cross section. We also performed FWM experiments in SiON rings and obtained the nonlinear parameter γ of 0.02 m −1 W −1. Our results point to a low-loss and low-index photonic integrated platform that is both Brillouin and Kerr active.

Original languageEnglish
Article number051302
JournalAPL Photonics
Issue number5
Early online date15 May 2023
Publication statusPublished - May 2023


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