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Conference 11999 > Paper 11999-37
Paper 11999-37

Modulation of cathodoluminescence emission by interference with external light


We explore the role that the electron wave function plays in cathodoluminescence (CL) emission when an external laser pulse is synchronized with the electron probe at the sample. We show that the the far-field emission is composed by coherent and incoherent contributions where the latter can only be modified by changing the electron density profile. In particular, shaped electrons lead to a partial suppression of the CL signal while its complete cancellation can be only achieved in the point-particle limit. We believe that our results open new routes toward coherent control of optical excitations at the atomic scale as well as toward a new method of studying ultrafast phenomena with a time resolution only limited by the width of the spectral window in the CL measurement.


ICFO - Institut de Ciències Fotòniques (Spain)
Valerio Di Giulio studied in "Universitá La Sapienza", Rome, statistical mechanics and quantum information obtaining his MSc degree in theoretical physics in 2017. During his master thesis, he studied a Bell-like inequality violated by quantum correlations which violation has been experimentally demonstrated through a quantum optics setup. Since 2018, Valerio has been working in the Nanophotonics Theory group at ICFO as a PhD student under the supervision of Prof. Javier García de Abajo. His research mostly focuses on the quantum interaction between free electrons and classical and quantum light supported by nanostructures.
ICFO - Institut de Ciències Fotòniques (Spain)
Ofer Kfir
Tel Aviv Univ. (Israel), Max-Planck-Institut für Biophysikalische Chemie (Germany)
Max-Planck-Institut für Biophysikalische Chemie (Germany), Georg-August-Univ. Göttingen (Germany)
ICFO - Institut de Ciències Fotòniques (Spain), Institució Catalana de Recerca i Estudis Avançats (Spain)