Strong-field photoemission from plasmonic nanoparticles

We model strong-field ionization from metal nanoparticles within a semi-classical approach in two distinct steps: (i) electron emission by an intense IR laser pulse using a quantum tunneling model and (ii) photoelectron propagation to the detector in the presence of the incident laser and induced plasmonic fields within a classical trajectory approach [1,2]. Based on simulated photoelectron-momentum distributions for 5 to 70 nm diameter gold nanospheres at two laser intensities, we scrutinize the effects of (i) electron-electron, (ii) electron-residual charge interactions, (iii) photoelectron rescattering and recombination, and (iv) electron temperature in comparison with measured velocity-map-image photoelectron spectra [3,4].

[1] E. Saydanzad, J. Li, and U. Thumm, Phys. Rev. A 95, 053406 (2017)

[2] E. Saydanzad, J. Li, and U. Thumm, Phys. Rev. A 98, 063422 (2018)

[3] J. A. Powell et al., Optics Express 27, 27124 (2019)

[3] E.Saydanzad, J. A. Powell , J. Li et al., In progress, 2021