Scientists Build Lasers Out of Sound, Call Them Phasers

Using a nanoscale drum, scientists have built a laser that uses sound waves instead of light like a conventional laser.

Because laser is an acronym for “light amplification by stimulated emission of radiation,” these new contraptions – which exploit particles of sound called phonons – should properly be called phasers. Such devices could one day be used in ultrasound medical imaging, computer parts, high-precision measurements, and many other places.