A group of scientists from the United Kingdom and Spain have built the world’s first working acoustic tractor beam.
Holograms are 3D light-fields that can be projected from a 2D surface; Asier Marzo of the University of Bristol and the Public University of Navarre and his colleagues have created acoustic holograms with shapes such as tweezers, twisters and cages that exert forces on particles to levitate and manipulate them. Image credit: Asier Marzo / Bruce Drinkwater / Sriram Subramanian.
“It was an incredible experience the first time we saw the object held in place by the tractor beam. All my hard work has paid off, it’s brilliant,” said Asier Marzo of the University of Bristol and the Public University of Navarre, a team member and the first author of a paper in the journal Nature Communications .
The… Read more