ImagiNg carrier DynamIcs at the nANoscAle thanks to light- and electron-matter interactions – INDIANA

The performance optimization of optoelectronic devices requires a precise knowledge of the semiconductor materials properties at the nanoscale. To go beyond the inherent limits of both far-field optical microscopy and cathodoluminescence spectroscopy, the INDIANA project propose to simultaneously probe light-matter and electron-matter interactions to access fundamental optical properties at the nanoscale. This new correlative technique will be used to explore three research directions. We will first estimate micro-LEDs efficiency at the nanoscale. Then, by exciting simultaneously an LED with an electron beam and a below band gap excitation laser, we will investigate the influence of point defects on blue LED efficiency at the nanoscale. Finally, we will use the technique in a pump-probe configuration to access to the local temperature of diamond power electronic devices with a temporal resolution better than 1 µs.