Attosecond pulses (IMAGE) University of Oldenburg Caption Schematic representation of the experimental setup: Attosecond pulses (violet) eject electrons (green) from a crystal surface. The photoemission electron microscope (cone-shaped instrument at top) examines the rapid movements of the electrons. Credit Image: Jan Vogelsang Usage Restrictions Please use only with press release and with appropriate 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.