Figure 1.

Sketch of the system under consideration. A laser pulse and a modulated electron are made to interact with a sample and produce light scattering and cathodoluminescence (CL) emission, respectively. The electron is synchronized with the laser pulse to maintain mutual phase coherence. The resulting emitted and scattered photons are collected by a spectrometer. A laser pulse shaper is inserted in this scheme to bring the scattered light amplitude to a level that is commensurate with the CL emission field.