It has long been considered common sense that a single device performs only one function. Just as tuning a radio to a different frequency changes the channel, systems that manipulate waves have traditionally been designed to operate at only one specific frequency, requiring different devices for different frequencies. Now, however, researchers have opened up a new possibility: a single thin plate can simultaneously distinguish elastic waves of multiple frequencies and precisely direct each of them to different locations.
Elastic metasurface can capture multiple frequencies at once
