An intense lightwave drives ultrafast electronic motion in a bulk crystal. A novel quantum interference creates free electrons and causes the emission of ultrashort high-harmonic light bursts. Credit: B. Baxley /parttowhole.com
Physicists from Regensburg and Marburg, Germany have succeeded in taking a slow-motion movie of speeding electrons in a solid driven by a strong light wave. In the process, they have unraveled a novel quantum phenomenon, which is reported in the recent edition of Nature.