Time-Domain Vectorial Field Reconstruction of a Circularly Polarized Harmonic from Silicon Using 2D Spectral Shearing Interferometry

A two-dimensional spectral shearing interferometry is demonstrated permitting to reconstruct vectorial optical fields with picojoule energy. As proof of principle, we retrieve the circularly polarized third-harmonic field emitted from 2-μm-thin silicon driven by 2.1-μm pulses. © 2019 The Author(s)