We are pleased to share our latest research, “Surface acoustic wave Brillouin photonics on a silicon nitride chip,” published in Nature Photonics.

In this work, a collaboration between the University of Twente and McMaster University, we achieved strong stimulated Brillouin scattering on a standard silicon nitride platform by adding a thin layer of tellurium oxide. This approach increases the Brillouin gain by over 200 times while maintaining low losses.

Using this platform, we demonstrated a 5-dB net-gain Brillouin amplifier, a narrow-linewidth stimulated Brillouin laser, and an ultranarrow microwave filter. These results enable a wide range of high-performance radio-frequency and optical technologies to be integrated directly into compact silicon nitride chips.

Congrats, Yvan and the entire team!