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

Abstract

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.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1342280
Alternate Identifier(s):
OSTI ID: 1213049
Grant/Contract Number:  
AC02-05CH11231; FG02-13ER16403
Resource Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Name: New Journal of Physics Journal Volume: 16 Journal Issue: 11; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United Kingdom
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; condensed matter; electrical, magnetic and optical

Citation Formats

Beck, Annelise R., Bernhardt, Birgitta, Warrick, Erika R., Wu, Mengxi, Chen, Shaohao, Gaarde, Mette B., Schafer, Kenneth J., Neumark, Daniel M., and Leone, Stephen R. Attosecond transient absorption probing of electronic superpositions of bound states in neon: detection of quantum beats. United Kingdom: N. p., 2014. Web. doi:10.1088/1367-2630/16/11/113016.
Beck, Annelise R., Bernhardt, Birgitta, Warrick, Erika R., Wu, Mengxi, Chen, Shaohao, Gaarde, Mette B., Schafer, Kenneth J., Neumark, Daniel M., & Leone, Stephen R. Attosecond transient absorption probing of electronic superpositions of bound states in neon: detection of quantum beats. United Kingdom. https://doi.org/10.1088/1367-2630/16/11/113016
Beck, Annelise R., Bernhardt, Birgitta, Warrick, Erika R., Wu, Mengxi, Chen, Shaohao, Gaarde, Mette B., Schafer, Kenneth J., Neumark, Daniel M., and Leone, Stephen R. Sat . "Attosecond transient absorption probing of electronic superpositions of bound states in neon: detection of quantum beats". United Kingdom. https://doi.org/10.1088/1367-2630/16/11/113016.
@article{osti_1342280,
title = {Attosecond transient absorption probing of electronic superpositions of bound states in neon: detection of quantum beats},
author = {Beck, Annelise R. and Bernhardt, Birgitta and Warrick, Erika R. and Wu, Mengxi and Chen, Shaohao and Gaarde, Mette B. and Schafer, Kenneth J. and Neumark, Daniel M. and Leone, Stephen R.},
abstractNote = {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.},
doi = {10.1088/1367-2630/16/11/113016},
journal = {New Journal of Physics},
number = 11,
volume = 16,
place = {United Kingdom},
year = {Sat Nov 01 00:00:00 EDT 2014},
month = {Sat Nov 01 00:00:00 EDT 2014}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1088/1367-2630/16/11/113016

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Cited by: 54 works
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