Modulation of cathodoluminescence emission by interference with external light

Valerio Di Giulio; Ofer Kfir; Claus Ropers; F. Javier García de Abajo

doi:10.1117/12.2607364

7 March 2022 Modulation of cathodoluminescence emission by interference with external light

Valerio Di Giulio, Ofer Kfir, Claus Ropers, F. Javier García de Abajo

Author Affiliations +

Proceedings Volume PC11999, Ultrafast Phenomena and Nanophotonics XXVI; PC119990O (2022) https://doi.org/10.1117/12.2607364
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

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.

Conference Presentation

Citation Download Citation

Valerio Di Giulio, Ofer Kfir, Claus Ropers, and F. Javier García de Abajo "Modulation of cathodoluminescence emission by interference with external light", Proc. SPIE PC11999, Ultrafast Phenomena and Nanophotonics XXVI, PC119990O (7 March 2022); https://doi.org/10.1117/12.2607364

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