Speaker
Description
Charged particles traversing carbon-based nanostructures can trigger electromagnetic (plasmonic) modes through the collective excitation of surface electron gases. This phenomenon presents a promising avenue for achieving ultra-high particle acceleration gradients. Plasmonic excitations can be explored using both analytical models and particle-based simulations. In this work, we first revisit the theoretical framework based on a linearized hydrodynamic model describing a point charge moving along carbon nanotubes and graphene layers. Within this model, surface-confined electrons are treated as a two-dimensional plasma, with additional momentum contributions arising from the solid-state characteristics of the electron gas. We then compare the plasmonic responses predicted by the hydrodynamic model with those obtained via Particle-in-Cell (PIC) simulations. Finally, we conduct a detailed analysis to assess the similarities, differences, and limitations of both approaches.
