Excitation of two-photon photoemission where epsilon is near zero on Ag(111)

Abstract

Because silver has epsilon-near-zero (ENZ) in the near-UV spectral region, its optical response is expected to be dominantly plasmonic and nonperturbatively nonlinear. The ENZ properties of Ag have made it the material of choice for investigation of plasmonic optical effects in physics, chemistry, optics, and nanotechnology. We investigate the nonlinear angle-resolved two-photon photoemission (2PP) spectroscopy of Ag(111) surface in the ENZ region. In addition to the well-understood and documented spectroscopic features of Einsteinian photoemission involving dipole excitations of the single-particle occupied and unoccupied surface states, 2PP spectra possess other distinct features where the optical fields excite or are modified by the collective virtual and real plasmon excitations.

arXiv comment16 pages, 4 figures; 15 pages SI material, 6 figures

References in corpus (9)

• Theory of surface plasmons and surface-plasmon polaritons
• Transient excitons at metal surfaces
• Beyond the perturbative description of the nonlinear optical response of low-index materials
• First--principles calculation of the plasmon resonance and of the reflectance spectrum of Silver in the GW approximation
• Coherent two-dimensional multiphoton photoelectron spectroscopy of metal surfaces
• Experimental evidence of above-threshold photoemission in solids
• Response theory for time-resolved second-harmonic generation and two-photon photoemission
• Role of the kinematics of probing electrons in electron energy-loss spectroscopy of solid surfaces
• Angle resolved Photoemission from Ag and Au single crystals: Final state lifetimes in the as range

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• Plasmonically assisted channels of photoemission from metals
• Distinguishing thermal from non-thermal ("hot") carries in illuminated molecular junctions
• Towards full surface Brillouin zone mapping by coherent multi-photon photoemission
• Photoexcited organic molecules $enroute$ to highly efficient autoionization
• Multi-plasmon effects and plasmon satellites in photoemission from nanostructures
• Nonperturbative quantum theory of multiplasmonic electron emission from surfaces: Gauge-specific cumulant expansions vs. Volkov ansatz over plasmonic coherent states
• Electron emission from plasmonically induced Floquet bands at metal surfaces