Schematic (IMAGE) American Friends of Tel Aviv University Caption This is a schematic of the experiment where the excitons are set in motion by an light pulse ('Pump') and consequently sensed by a following, delayed weaker light pulse ('Probe'). The Probe is detected at each location on the sample to form an image. A sequence of images is collected for different delays. Credit Michael Mrejen/TAU 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.