New technique to trap soundwaves and light on a chip in large-scale circuits

https://phys.org/news/2022-10-technique-soundwaves-chip-large-scale-circuits.html

"low-loss multilayer silicon nitride nanophotonic circuits confine optical and acoustic waves... 50 cm spiral waveguides... traps soundwave prevents acoustic leakage... RF cancelation notch filter... integration stimulated Brillouin scattering large circuits... integrated with other emerging technologies such as tunable lasers, frequency combs, and programmable photonic circuits, potentially giving them a part in the future development of fields ranging from telecommunications to quantum computing"

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