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Title: Orientation dependence of temporal and spectral properties of high-order harmonics in solids [Orientation dependence of high-harmonic temporal and spectral properties in solids]

Abstract

We investigate the connection between crystal symmetry and temporal and spectral properties of high-order harmonics in solids. We calculate the orientation-dependent harmonic spectrum driven by an intense, linearly polarized infrared laser field, using a momentum-space description of the generation process in terms of strong-field-driven electron dynamics on the band structure. We show that the orientation dependence of both the spectral yield and the subcycle time profile of the harmonic radiation can be understood in terms of the coupling strengths and relative curvatures of the valence band and the low-lying conduction bands. In particular, we show that in some systems this gives rise to a rapid shift of a quarter optical cycle in the timing of harmonics in the secondary plateau as the crystal is rotated relative to the laser polarization. Here, we address recent experimental results in MgO and show that the observed change in orientation dependence for the highest harmonics can be interpreted in the momentum space picture in terms of the contributions of several different conduction bands.

Authors:
 [1];  [2];  [2];  [2];  [1];  [1];  [1]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
  2. 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:
1416562
Alternate Identifier(s):
OSTI ID: 1413821
Grant/Contract Number:  
PHY-1403236; PHY-1713671; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Wu, Mengxi, You, Yongsing, Ghimire, Shambhu, Reis, David A., Browne, Dana A., Schafer, Kenneth J., and Gaarde, Mette B. Orientation dependence of temporal and spectral properties of high-order harmonics in solids [Orientation dependence of high-harmonic temporal and spectral properties in solids]. United States: N. p., 2017. Web. doi:10.1103/physreva.96.063412.
Wu, Mengxi, You, Yongsing, Ghimire, Shambhu, Reis, David A., Browne, Dana A., Schafer, Kenneth J., & Gaarde, Mette B. Orientation dependence of temporal and spectral properties of high-order harmonics in solids [Orientation dependence of high-harmonic temporal and spectral properties in solids]. United States. doi:10.1103/physreva.96.063412.
Wu, Mengxi, You, Yongsing, Ghimire, Shambhu, Reis, David A., Browne, Dana A., Schafer, Kenneth J., and Gaarde, Mette B. Mon . "Orientation dependence of temporal and spectral properties of high-order harmonics in solids [Orientation dependence of high-harmonic temporal and spectral properties in solids]". United States. doi:10.1103/physreva.96.063412. https://www.osti.gov/servlets/purl/1416562.
@article{osti_1416562,
title = {Orientation dependence of temporal and spectral properties of high-order harmonics in solids [Orientation dependence of high-harmonic temporal and spectral properties in solids]},
author = {Wu, Mengxi and You, Yongsing and Ghimire, Shambhu and Reis, David A. and Browne, Dana A. and Schafer, Kenneth J. and Gaarde, Mette B.},
abstractNote = {We investigate the connection between crystal symmetry and temporal and spectral properties of high-order harmonics in solids. We calculate the orientation-dependent harmonic spectrum driven by an intense, linearly polarized infrared laser field, using a momentum-space description of the generation process in terms of strong-field-driven electron dynamics on the band structure. We show that the orientation dependence of both the spectral yield and the subcycle time profile of the harmonic radiation can be understood in terms of the coupling strengths and relative curvatures of the valence band and the low-lying conduction bands. In particular, we show that in some systems this gives rise to a rapid shift of a quarter optical cycle in the timing of harmonics in the secondary plateau as the crystal is rotated relative to the laser polarization. Here, we address recent experimental results in MgO and show that the observed change in orientation dependence for the highest harmonics can be interpreted in the momentum space picture in terms of the contributions of several different conduction bands.},
doi = {10.1103/physreva.96.063412},
journal = {Physical Review A},
number = 6,
volume = 96,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
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Citation Metrics:
Cited by: 12 works
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Figures / Tables:

FIG. 1 FIG. 1: (Color online) (a) Dotted lines show band structure for the 2D square crystal. Only bands with the same color have dipole-allowed couplings. (b) Harmonic spectra along Γ-X (thin dashed line) and Γ-M (thick solid line), generated by a 1600 nm, 3.0 TW/cm2 laser pulse (shown in log scale).more » Vertical solid (dashed) lines indicate the maximum VB-CB separations that can be reached in the two lowest red CBs in the Γ -X (Γ-M) direction. (c,d) Time-frequency plots of the harmonic emission polarized along (c) Γ-X and (d) Γ- M. Solid (dashed) lines in (c,d) indicate the instantaneous band gap between the VB and the lowest (next-lowest, dipolecoupled) CB.« less

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Works referenced in this record:

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