Laser generated guided high-frequency acoustic waves on the surface of a microchip

https://www.newelectronics.co.uk/content/news/scientists-harness-sound-waves-on-the-surface-of-a-microchip

"chips with wave guide use cooler light, sound instead of electricity... soft glass from germanium, arsenic, selenide measures strong interactions between light/ sound... stimulated Brillouin scattering created by enhanced feedback loop between photons/ phonons (coupling, enhancing power) creating vibrations transporting processing information... 5G/6G, broadband networks, sensors, communication (satellites), radar systems, defence systems, radio astronomy, signal processing"