Temporal and spectral disentanglement of laser-driven electron tunneling emission from a solid

Abstract

By measuring energy spectra of the electron emission from a sharp tungsten tip induced by few-cycle laser pulses, the laser-field dependence of the emission mechanism was investigated. In strong laser fields, we confirm the appearance of laser-driven tunneling emission and find that it can be disentangled from the concomitant photo-excited electron emission, both temporally and spectrally, by the opening of a peculiar emission channel. This channel involves prompt laser-driven tunneling emission and subsequent laser-driven electron re-scattering off the surface, delayed by the electrons traveling far inside the metal before scattering. The quantitative understanding of these processes gives insights on attosecond tunneling emission from solids and should prove useful in designing new types of pulsed electron sources.

4 pages, 3 figures, submitted to Physical Review Letters

References in corpus (7)

• Attosecond control of electrons emitted from a nanoscale metal tip
• A Femtosecond Nanometer Free Electron Source
• A spatially and temporally localized sub-laser-cycle electron source
• Strong-field above-threshold photoemission from sharp metal tips
• Laser-induced ultrafast electron emission from a field emission tip
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Cited by in corpus (13)

• Attosecond physics at the nanoscale
• Phase-resolved Detection of Ultrabroadband THz Pulses inside a Scanning Tunneling Microscope Junction
• Coulomb-correlated electron number states in a transmission electron microscope beam
• Emergence of a higher energy structure in strong field ionization with inhomogeneous electric fields
• Femtosecond Thermal and Nonthermal Hot Electron Tunneling inside a Photoexcited Tunnel Junction
• Extreme Lightwave Electron Field Emission from a Nanotip
• High brightness ultrafast Transmission Electron Microscope based on a laser-driven cold-field emission source: principle and applications
• Optical Control of Young's Type Double-slit Interferometer for Laser-induced Electron Emission from a Nano-tip
• Analytical approximations for the higher energy structure in strong field ionization with inhomogeneous electric fields
• Correlations between the final momenta of electrons and their initial phase-space distribution in the process of tunnel ionization
• Non-perturbative Solution of the 1d Schrodinger Equation Describing Photoemission from a Sommerfeld model Metal by an Oscillating Field
• Evidence of coherence in strong-field electron photoemission from a semiconductor
• Onset of space-charge effects in strong-field photocurrents from nanometric needle tips