Picosecond Cathodoluminescence



<H1 align=center>Picosecond Cathodoluminescence
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<h2 align=center>Michele Merano, <br>LOA-ENSTA in Palaiseau, France

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Abstract:  We have developed an original time resolved cathodoluminescence set up. Electron pulses are produced by a laser driven picosecond electron gun that replaces the thermionic electron gun of a scanning electron microscope.  The secondary electron and the cathodoluminescence imaging mode, joined with time resolved spectroscopic detection, lead insight into phenomena like transport, carrier capture and carrier recombination in a single nanostructure.  This set up achieves remarkable combined spatial (50 nm) and temporal resolutions (12 ps). The carrier dynamics within GaAs based pyramidal nanostructures is reported.

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