Speaker
Description
Charged particles moving through carbon nanostructures may excite electromagnetic modes (plasmonic modes) due to the collective excitation of the electron gas in their surfaces. This effect might be a potential candidate to accelerate particles with ultra-high accelerating gradients. The plasmonic excitations can be studied by particle simulations and with analytical models. In this contribution, we firstly review the existing theory based on a linearised hydrodynamic model for a point-like charge propagating along a carbon nanotube and graphene layers. In this model, the electrons confined over the surfaces are treated as a two-dimensional plasma with additional contributions to the fluid momentum equation from specific solid-state properties of the electron gas. Then, we compare the plasmonic excitations derived from the hydrodynamic model with those obtained from Particle-in-Cell simulations. Finally, a comprehensive analysis is performed to explore the similarities, differences, and limitations of both methods.
