Optically Trapped Rotors (IMAGE) University of Exeter Caption 5 optically trapped rotors positioned in a ring around two freefloating silica beads. The beads can be arbitrarily moved by spinning the rotors in a calculated way. The diameter of the ring is approx the width of a human hair. Credit Dave Phillips Usage Restrictions see credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.