Abstract
Non-perturbative or strong-field optical phenomena are potentially useful for attosecond pulse generation
in the extreme ultraviolet region, table-top accelerators, lighwave-electronics, etc. Nanoscale engineering
of the optical field allows us to downsize the driving lightsource and may provide better control
over electron trajectories and new functionalities. In this article, we discuss field enhancement properties
of metal nanoantennas in the femtosecond time domain and introduce our recent results on plasmonically-
enhanced strong-field photoemission and high harmonic generation. We also discuss the prospects
of strong-field science enabled by nanoscale engineering.
