The direct evaluation of attosecond chirp from a streaking measurement

TL;DR

This paper presents an analytical method to directly evaluate the chirp of an isolated attosecond pulse from streaking measurements, enabling quick and robust characterization of pulse dispersion.

Contribution

It introduces a new analytical expression linking streaked photoelectron spectrum breadth to pulse chirp, facilitating instant attosecond pulse characterization.

Findings

Derived an analytical expression relating spectrum breadth to pulse chirp

Developed a simple procedure for instant chirp extraction

Validated the method's robustness and efficiency

Abstract

We derive an analytical expression, from classical electron trajectories in a laser field, that relates the breadth of a streaked photoelectron spectrum to the group-delay dispersion of an isolated attosecond pulse. Based on this analytical expression, we introduce a simple, efficient and robust procedure to instantly extract the attosecond pulse's chirp from the streaking measurement.