Surface acoustic waves on a chip create high-performance integrated photonic RF components

https://phys.org/news/2026-03-mini-earthquakes-tiny-chips-radio.html#google_vignette

"silicon nitride chip used building radio filters/ amplifiers. but interaction between light/ sound waves within it too weak... overcome coating with tellurium oxide thin layer (200X more tightly), facilitating wave travel along chip's surface, creating light/ sound synergy... Brillouin sound-based amplifier, preventing signal fade, generating precise radio tone using half-mm-wide resonator... ultra-sharp radio signal filtering, avoiding interference in packed wireless networks... 6G, radar, satellite navigation"