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Title: Generating high-order optical and spin harmonics from ferromagnetic monolayers

Abstract

High-order harmonic generation (HHG) in solids has entered a new phase of intensive research, with envisioned band-structure mapping on an ultrashort time scale. This partly benefits from a flurry of new HHG materials discovered, but so far has missed an important group. HHG in magnetic materials should have profound impact on future magnetic storage technology advances. Here we introduce and demonstrate HHG in ferromagnetic monolayers. We find that HHG carries spin information and sensitively depends on the relativistic spin–orbit coupling; and if they are dispersed into the crystal momentum k space, harmonics originating from real transitions can be k-resolved and carry the band structure information. Geometrically, the HHG signal is sensitive to spatial orientations of monolayers. Different from the optical counterpart, the spin HHG, though probably weak, only appears at even orders, a consequence of SU(2) symmetry. Our findings open an unexplored frontier—magneto-high-order harmonic generation.

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [3]
  1. Indiana State Univ., Terre Haute, IN (United States)
  2. Lanzhou Univ. (China)
  3. Univ. of Missouri-St. Louis, St. Louis, MO (United States)
Publication Date:
Research Org.:
Indiana State Univ., Terre Haute, IN (United States); Lawrence Berkeley National Lab. (LBNL), CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1511704
Grant/Contract Number:  
FG02-06ER46304; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Zhang, G. P., Si, M. S., Murakami, M., Bai, Y. H., and George, Thomas F. Generating high-order optical and spin harmonics from ferromagnetic monolayers. United States: N. p., 2018. Web. doi:10.1038/s41467-018-05535-4.
Zhang, G. P., Si, M. S., Murakami, M., Bai, Y. H., & George, Thomas F. Generating high-order optical and spin harmonics from ferromagnetic monolayers. United States. doi:10.1038/s41467-018-05535-4.
Zhang, G. P., Si, M. S., Murakami, M., Bai, Y. H., and George, Thomas F. Thu . "Generating high-order optical and spin harmonics from ferromagnetic monolayers". United States. doi:10.1038/s41467-018-05535-4. https://www.osti.gov/servlets/purl/1511704.
@article{osti_1511704,
title = {Generating high-order optical and spin harmonics from ferromagnetic monolayers},
author = {Zhang, G. P. and Si, M. S. and Murakami, M. and Bai, Y. H. and George, Thomas F.},
abstractNote = {High-order harmonic generation (HHG) in solids has entered a new phase of intensive research, with envisioned band-structure mapping on an ultrashort time scale. This partly benefits from a flurry of new HHG materials discovered, but so far has missed an important group. HHG in magnetic materials should have profound impact on future magnetic storage technology advances. Here we introduce and demonstrate HHG in ferromagnetic monolayers. We find that HHG carries spin information and sensitively depends on the relativistic spin–orbit coupling; and if they are dispersed into the crystal momentum k space, harmonics originating from real transitions can be k-resolved and carry the band structure information. Geometrically, the HHG signal is sensitive to spatial orientations of monolayers. Different from the optical counterpart, the spin HHG, though probably weak, only appears at even orders, a consequence of SU(2) symmetry. Our findings open an unexplored frontier—magneto-high-order harmonic generation.},
doi = {10.1038/s41467-018-05535-4},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 13 works
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Figures / Tables:

Fig. 1 Fig. 1: High-order harmonic generation in ferromagnetic materials. a An intense laser pulse excites a ferromagnetic iron monolayer and generates high-order harmonics. The harmonic has spin signature on the spectrum and can be dispersed in the crystal momentum space, so the harmonic peak can be assigned to a unique transitionmore » between occupied and unoccupied states. Higher-order harmonics are more sensitive to the band structure change than lower-order ones, thus making HHG an ideal tool for spin-resolved detection. b Brillouin zone of a simple orthorhombic structure. c Two film orientations—Fe(110) and Fe(001)—are placed in the ab (or xy) plane« less

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      Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.