Researchers in China have built a new device that can create a
laser beam out of sound particles.
The sound laser, developed by a team at Hunan Normal University in Changsha, is 10 times more powerful than any previous device that uses similar technology.
Unlike conventional
lasers, which output light particles called photons in a narrow beam, the new laser emits sound particles called phonons.
As the acoustic analogue of optical lasers, the sound laser is also able to transmit information at high speeds.
The phonon laser’s ability to move through liquids without being distorted to the same extent as light-based lasers means it could prove more effective than current technologies in everything from biomedicine to underwater monitoring.…..
https://www.independent.co.uk/tech/lasers-sound-laser-phonon-biomedicine-b2515038.html