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Title: Interferometry of dipole phase in high harmonics from solids

Abstract

Understanding the temporal profiles of high harmonics is essential for their applications in attosecond science. Microscopically, the dipole phase plays an important role in determining the high-harmonic emission phase. In gas-phase high-harmonic generation, the tunnel-ionized electron spends much of its travel time in the continuum—far from the parent ion, where it accumulates the dipole phase. Therefore, the atomic dipole phase is largely independent of the target atom. In solid-state high-harmonic generation, since the driven electron experiences a periodic potential during the entire travel time, the dipole phase may depend on the electronic structures of source materials. Here, we employ an interferometric method to characterize high harmonics from magnesium oxide and quartz crystals. We measure material-dependent intensity-induced high-harmonic phase delays that we attribute to the intensity-induced changes in the dipole phase originating from the interband polarization. The material-dependent dipole phase can provide a robust platform for high-harmonic spectroscopy of solids.

Authors:
 [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1503234
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Nature Photonics
Additional Journal Information:
Journal Volume: 13; Journal Issue: 2; Journal ID: ISSN 1749-4885
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Lu, Jian, Cunningham, Eric F., You, Yong Sing, Reis, David A., and Ghimire, Shambhu. Interferometry of dipole phase in high harmonics from solids. United States: N. p., 2018. Web. doi:10.1038/s41566-018-0326-x.
Lu, Jian, Cunningham, Eric F., You, Yong Sing, Reis, David A., & Ghimire, Shambhu. Interferometry of dipole phase in high harmonics from solids. United States. https://doi.org/10.1038/s41566-018-0326-x
Lu, Jian, Cunningham, Eric F., You, Yong Sing, Reis, David A., and Ghimire, Shambhu. Mon . "Interferometry of dipole phase in high harmonics from solids". United States. https://doi.org/10.1038/s41566-018-0326-x. https://www.osti.gov/servlets/purl/1503234.
@article{osti_1503234,
title = {Interferometry of dipole phase in high harmonics from solids},
author = {Lu, Jian and Cunningham, Eric F. and You, Yong Sing and Reis, David A. and Ghimire, Shambhu},
abstractNote = {Understanding the temporal profiles of high harmonics is essential for their applications in attosecond science. Microscopically, the dipole phase plays an important role in determining the high-harmonic emission phase. In gas-phase high-harmonic generation, the tunnel-ionized electron spends much of its travel time in the continuum—far from the parent ion, where it accumulates the dipole phase. Therefore, the atomic dipole phase is largely independent of the target atom. In solid-state high-harmonic generation, since the driven electron experiences a periodic potential during the entire travel time, the dipole phase may depend on the electronic structures of source materials. Here, we employ an interferometric method to characterize high harmonics from magnesium oxide and quartz crystals. We measure material-dependent intensity-induced high-harmonic phase delays that we attribute to the intensity-induced changes in the dipole phase originating from the interband polarization. The material-dependent dipole phase can provide a robust platform for high-harmonic spectroscopy of solids.},
doi = {10.1038/s41566-018-0326-x},
journal = {Nature Photonics},
number = 2,
volume = 13,
place = {United States},
year = {Mon Dec 17 00:00:00 EST 2018},
month = {Mon Dec 17 00:00:00 EST 2018}
}

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