Light Trapped on Nanoparticle (1 of 2) (IMAGE) Imperial College London Caption Artistic image of light trapped on the surface of a nanoparticle topological insulator. Credit Vincenzo Giannini Usage Restrictions None 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.