IMAGE:Illustration of the exciton of TiO2 interacting with a propagating coherent acoustic wave. Image credit:Adriel Dominguez (Max Planck Institute, Hamburg) One of the main challenges in materials science research is to achieve high tunability of the optical properties of semiconductors at room temperature. These properties are governed by "excitons", which are bound pairs of negative electrons and positive holes in a semiconductor. Excitons have become increasingly important...
