Photoionization delays in xenon using single-shot referencing in the collinear back-focusing geometry

Abstract

Attosecond photoemission delays for all the valence (5p 3/2 , 5p 1/2 , 5s, 4d 5/2 , 4d 3/2 ) subshells of xenon have been accessed using the interferometric RABBITT technique. The 4d subshell delays in Xe have been accessed for the first time due to the high photon energy used. A novel technique of single-shot referencing in the collinear back-focusing geometry has been introduced. This enables us to distinguish the signal from principal photoelectron peaks due to ionization by extreme ultraviolet radiation (XUV) only and infrared (IR) -induced sideband (SB) contributions, especially in the regions of spectral overlap.

Dominance of correlation and relativistic effects on photodetachment time delay well above threshold

“…Finally, the results suggest a fruitful area for experimental inquiry. With a recent expansion of attosecond spectroscopy to a broader photon energy range [16,35], experimental verification of the present results becomes within the reach.…”

Attosecond electron–spin dynamics in Xe 4d photoionization

“…1 ). Single Auger decay from Xe + (e.g., 4 d 5/2 ) to Xe 2+ (e.g., 5 s −1 5 p −1 ) leads to electrons at kinetic energies equal to the difference between intermediate and final state energies, spanning from 8.3 eV to 36.4 eV 31 and thus overlapping with the photoelectrons ionized by 75–100 eV photons 32 . Figure 2 shows XUV-only (a) and XUV+IR (b) two-dimensional coincidence maps.…”

Using a passively stable attosecond beamline for relative photoemission time delays at high XUV photon energies

“…Our scheme, therefore, presents a simpler, faster measurement scheme, allowing the measurements at different photon energies with the use of different multilayer mirrors. Recently, photoionization delays from the 4d subshell of xenon have been accessed by implementation of single-shot referencing in this collinear back-focusing geometry [41].…”