Abstract
When the electric field of light becomes comparable to or larger than the internal fields experienced by
electrons in matter, the electron dynamics are then governed by optical-field-driven processes. By
combining ultrashort laser pulses and the optical field enhancement at the surface of metallic
nanostructures, such high-field strengths can be reached with moderate laser powers and without damaging
the structures. Moreover, photoelectrons emitted from the surface under such intense optical fields with
ultrashort durations are temporally and spatially well confined. Additionally, these electrons have been
shown to be sensitive to the optical field waveform, underscoring the possibilities to control electron on a
sub-optical, attosecond timescale. This review provides an overview of these strong-field-driven
attosecond electron dynamics at nanostructures, extending its future ramifications as a key ingredient for
light-field electronics, whose operation bandwidth may reach the petarahertz frequency range.
