A moiré trap for excitons (IMAGE) DOE/SLAC National Accelerator Laboratory Caption When two thin films with repeating patterns are overlain at a specific angle, they produce a moiré pattern. In the field of spectroscopy, this pattern results in varying levels of electronic energy across the sample, a phenomenon called moiré potential. The researchers found that excitons tend to be concentrated in areas where the energy is minimal. Credit OIST Usage Restrictions None License Original 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.