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Cathodoluminescence from geology to nano and quantum optics

Thursday, May 20 2021, 11 am

Sophie Meuret, CEMES-CNRSRetour ligne automatique

Cathodoluminescence from geology to nano and quantum optics

Conférence Zoom ouverte à tous : https://cnrs.zoom.us/j/92970846016

ID de réunion : 929 7084 6016 | Code secret : V2Mm9j

 

Cathodoluminescence is the emission of visible light by matter when excited by an electron. It is the phenomenon behind our old TV screen. It is also one of the most commonly used methods of geologist to study rocks and their defects.

The idea later came that one could use Cathodoluminescence to study the optical properties of materials with a nanometer resolution. It became especially relevant with the apparition of atomically designed structures like LEDs and Semiconductor Lasers.

Since then, cathodoluminescence spectroscopy became a technique of choice for nano-optics and is starting to flirt with the sexy world of quantum optics. In this presentation we will discuss the potential of CL and show that this technique has much more to give than your grandmother TV. 

 

Sophie Meuret is a CNRS researcher in CEMES since 2019, in the I3EM group. She obtained her PhD from the University Paris Saclay (Paris, France). She did her Post-Doc in the Photonic Materials group at AMOLF (Amsterdam, The Netherlands) where she developed ultra-fast time-resolved cathodoluminescence (CL) spectroscopy, using two different approaches.

The first one uses an ultrafast beam blanker while the second one uses the principle of photoemission with a pulsed-laser driven electron gun. In CEMES she continues her work on time-resolved cathodoluminescence while also exploring the complementarity between Cathodoluminescence and Electron Holography.