A time-resolved cathodoluminescence (TRCL) tool, Chronos, by Attolight, has been installed at C2N in November 2015, and upgraded in 2019.

Sketch of the CL/TRCL tool installed at C2N

Our CL tool combines a scanning electron microscope (SEM) with a spatial resolution down to 10 nm, a ultrastable nanopositioning stage with low temperature capability (10K to 300K), and achromatic collection optics that enable quantitative CL over a wide field of view. It also features a high sensitivity EBIC (Electron Beam Induced Current) detection solution.

The luminescence is analyzed through two spectrometers and a series of detector arrays to cover a wide spectral range (250nm-1700nm).

The electron source can switch from continuous mode (CL) to pulsed mode (TRCL) driven by an ultrafast laser to create electron pulses, providing a temporal resolution down to 10 ps (repetition rate 80 MHz). Our TRCL system uses two complementary detection schemes: a time-correlated single photon counting (TCSPC) module equiped with a photomultiplier and an avalanche photodiode, and a streak camera.

Contact: stephane.collin@c2n.upsaclay.fr