Pulse analysis by delayed absorption from a coherently excited atom

TL;DR

The paper reviews the PANDA method for attosecond pulse characterization, highlighting its ability to avoid atomic latency effects and proposing its implementation with angle-resolved detection for measuring attosecond delays.

Contribution

It provides a pedagogical overview of PANDA, discusses implementation strategies, and suggests combining it with angle-resolved detection for advanced attosecond delay measurements.

Findings

PANDA can characterize pulses without atomic latency effects.

Implementation in alkali atoms is feasible using wave packets.

Combining with angle-resolved detection enables measurement of attosecond delays.

Abstract

In this tutorial we provide a short review of attosecond pulse characterization techniques and a pedagogical account of a recently proposed method called Pulse Analysis by Delayed Absorption (PANDA) [Pabst and Dahlstr\"om, Phys. Rev. A, 94, 13411 (2016)]. We discuss possible implementations of PANDA in alkali atoms using either principal quantum number wave packets or spin-orbit wave packets. The main merit of the PANDA method is that it can be used as a pulse characterization method that is free from atomic latency effects, such as scattering phase shifts and long-lived atomic resonances. Finally, we propose that combining the PANDA method with angle-resolved photoelectron detection should allow for experimental measurements of attosecond delays in photoionization from bound wave packets on the order of tens of attoseconds.