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Title: Attosecond transient absorption probing of electronic superpositions of bound states in neon: detection of quantum beats

Journal Article · · New Journal of Physics

Electronic wavepackets composed of multiple bound excited states of atomic neon lying between 19.6 and 21.5 eV are launched using an isolated attosecond pulse. Individual quantum beats of the wavepacket are detected by perturbing the induced polarization of the medium with a time-delayed few-femtosecond near-infrared (NIR) pulse via coupling the individual states to multiple neighboring levels. All of the initially excited states are monitored simultaneously in the attosecond transient absorption spectrum, revealing Lorentzian to Fano lineshape spectral changes as well as quantum beats. The most prominent beating of the several that were observed was in the spin–orbit split 3d absorption features, which has a 40 femtosecond period that corresponds to the spin–orbit splitting of 0.1 eV. The few-level models and multilevel calculations confirm that the observed magnitude of oscillation depends strongly on the spectral bandwidth and tuning of the NIR pulse and on the location of possible coupling states.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; FG02-13ER16403
OSTI ID:
1342280
Alternate ID(s):
OSTI ID: 1213049
Journal Information:
New Journal of Physics, Journal Name: New Journal of Physics Vol. 16 Journal Issue: 11; ISSN 1367-2630
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 54 works
Citation information provided by
Web of Science

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Cited By (6)

Space–time control of free induction decay in the extreme ultraviolet journal March 2017
Frequency-resolved optical gating technique for retrieving the amplitude of a vibrational wavepacket journal June 2015
Reconstruction of an excited-state molecular wave packet with attosecond transient absorption spectroscopy journal August 2016
First-principles simulations for attosecond photoelectron spectroscopy based on time-dependent density functional theory journal June 2018
Attosecond optics and technology: progress to date and future prospects [Invited] journal January 2016
Ab Initio Simulation of Attosecond Transient Absorption Spectroscopy in Two-Dimensional Materials journal September 2018

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