Attosecond Metrology

Authored by: Pierre Agostini , Andrew J. Piper , Louis F. DiMauro

Handbook of Laser Technology and Applications

Print publication date:  June  2021
Online publication date:  June  2021

Print ISBN: 9781138032613
eBook ISBN: 9781315389561
Adobe ISBN:

10.1201/b21828-21

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Abstract

This chapter covers various techniques that are used for the complete characterization of Extreme Ultraviolet (XUV), attosecond (10−18 s), light pulses generated through high harmonic generation (HHG) in gases. Because of the special problems posed by the wavelength domain, the wide spectral range and low intensity of sub-femtosecond XUV pulses, new approaches were required. These methods, with names Reconstruction of Attosecond Beating By Interference of Two-Photon Transitions (RABBITT), Streaking Camera, Complete Reconstruction of Attosecond Bursts (CRAB), Phase Retrieval by Oscillation of Omega Filtering (PROOF), and variants, are all based upon the spectrometry of the photoelectrons produced in a target gas by a superposition of the XUV attosecond pulse to be characterized and a femtosecond IR pulse. Such a two-colour non-linear process allows to retrieve both the spectral amplitude and phase of the XUV attosecond pulse, from which the time-domain properties can be derived by Fourier transform.

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