---
OA_place: publisher
OA_type: hybrid
_id: '21525'
abstract:
- lang: eng
  text: We present a novel design for an ultracompact, passive light source capable
    of generating ultraviolet and X-ray radiation, based on the interaction of free
    electrons with the magnetic near-field of a ferromagnet. Our design is motivated
    by recent advances in the fabrication of nanostructures, which allow the confinement
    of large magnetic fields at the surface of ferromagnetic nanogratings. Using ab
    initio simulations and a complementary analytical theory, we show that highly
    directional, tunable, monochromatic radiation at high frequencies could be produced
    from relatively low-energy electrons within a tabletop design. The output frequency
    is tunable in the extreme ultraviolet to hard X-ray range via electron kinetic
    energies from 1 keV to 5 MeV and nanograting periods from 1 μm to 5 nm. The proposed
    radiation source can achieve the tunability and monochromaticity of current free-electron-driven
    sources (free-electron lasers, synchrotrons, and laser-driven undulators), yet
    with a significantly reduced scale, cost, and complexity. Our design could help
    realize the next generation of tabletop or on-chip X-ray sources.
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: Sophie
  full_name: Fisher, Sophie
  last_name: Fisher
- first_name: Charles
  full_name: Roques-Carmes, Charles
  id: e2e68fc9-6505-11ef-a541-eb4e72cc3e82
  last_name: Roques-Carmes
- first_name: Nicholas
  full_name: Rivera, Nicholas
  last_name: Rivera
- first_name: Liang Jie
  full_name: Wong, Liang Jie
  last_name: Wong
- first_name: Ido
  full_name: Kaminer, Ido
  last_name: Kaminer
- first_name: Marin
  full_name: Soljačić, Marin
  last_name: Soljačić
citation:
  ama: Fisher S, Roques-Carmes C, Rivera N, Wong LJ, Kaminer I, Soljačić M. Monochromatic
    X-ray source based on scattering from a magnetic nanoundulator. <i>ACS Photonics</i>.
    2020;7(5):1096-1103. doi:<a href="https://doi.org/10.1021/acsphotonics.0c00121">10.1021/acsphotonics.0c00121</a>
  apa: Fisher, S., Roques-Carmes, C., Rivera, N., Wong, L. J., Kaminer, I., &#38;
    Soljačić, M. (2020). Monochromatic X-ray source based on scattering from a magnetic
    nanoundulator. <i>ACS Photonics</i>. American Chemical Society . <a href="https://doi.org/10.1021/acsphotonics.0c00121">https://doi.org/10.1021/acsphotonics.0c00121</a>
  chicago: Fisher, Sophie, Charles Roques-Carmes, Nicholas Rivera, Liang Jie Wong,
    Ido Kaminer, and Marin Soljačić. “Monochromatic X-Ray Source Based on Scattering
    from a Magnetic Nanoundulator.” <i>ACS Photonics</i>. American Chemical Society
    , 2020. <a href="https://doi.org/10.1021/acsphotonics.0c00121">https://doi.org/10.1021/acsphotonics.0c00121</a>.
  ieee: S. Fisher, C. Roques-Carmes, N. Rivera, L. J. Wong, I. Kaminer, and M. Soljačić,
    “Monochromatic X-ray source based on scattering from a magnetic nanoundulator,”
    <i>ACS Photonics</i>, vol. 7, no. 5. American Chemical Society , pp. 1096–1103,
    2020.
  ista: Fisher S, Roques-Carmes C, Rivera N, Wong LJ, Kaminer I, Soljačić M. 2020.
    Monochromatic X-ray source based on scattering from a magnetic nanoundulator.
    ACS Photonics. 7(5), 1096–1103.
  mla: Fisher, Sophie, et al. “Monochromatic X-Ray Source Based on Scattering from
    a Magnetic Nanoundulator.” <i>ACS Photonics</i>, vol. 7, no. 5, American Chemical
    Society , 2020, pp. 1096–103, doi:<a href="https://doi.org/10.1021/acsphotonics.0c00121">10.1021/acsphotonics.0c00121</a>.
  short: S. Fisher, C. Roques-Carmes, N. Rivera, L.J. Wong, I. Kaminer, M. Soljačić,
    ACS Photonics 7 (2020) 1096–1103.
date_created: 2026-03-30T12:22:47Z
date_published: 2020-04-01T00:00:00Z
date_updated: 2026-04-15T11:51:29Z
day: '01'
ddc:
- '530'
doi: 10.1021/acsphotonics.0c00121
extern: '1'
external_id:
  arxiv:
  - '1910.09629'
  pmid:
  - ' 32596415'
has_accepted_license: '1'
intvolume: '         7'
issue: '5'
keyword:
- X-ray sources
- free electrons
- nanostructure
- undulator
- synchrotron
- free-electron laser
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1021/acsphotonics.0c00121
month: '04'
oa: 1
oa_version: Published Version
page: 1096-1103
pmid: 1
publication: ACS Photonics
publication_identifier:
  eissn:
  - 2330-4022
publication_status: published
publisher: 'American Chemical Society '
quality_controlled: '1'
scopus_import: '1'
status: public
title: Monochromatic X-ray source based on scattering from a magnetic nanoundulator
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2020'
...