Coherent soft X-ray pulses from an echo-enabled harmonic generation free-electron laser
(2019) In Nature Photonics 13. p.555-561- Abstract
- X-ray free-electron lasers (FELs), which amplify light emitted by a relativistic electron beam, are extending nonlinear optical techniques to shorter wavelengths, adding element specificity by exciting and probing electronic transitions from core levels. These techniques would benefit tremendously from having a stable FEL source, generating spectrally pure and wavelength-tunable pulses. We show that such requirements can be met by operating the FEL in the so-called echo-enabled harmonic generation (EEHG) configuration. Here, two external conventional lasers are used to precisely tailor the longitudinal phase space of the electron beam before emission of X-rays. We demonstrate high-gain EEHG lasing producing stable, intense, nearly fully... (More)
- X-ray free-electron lasers (FELs), which amplify light emitted by a relativistic electron beam, are extending nonlinear optical techniques to shorter wavelengths, adding element specificity by exciting and probing electronic transitions from core levels. These techniques would benefit tremendously from having a stable FEL source, generating spectrally pure and wavelength-tunable pulses. We show that such requirements can be met by operating the FEL in the so-called echo-enabled harmonic generation (EEHG) configuration. Here, two external conventional lasers are used to precisely tailor the longitudinal phase space of the electron beam before emission of X-rays. We demonstrate high-gain EEHG lasing producing stable, intense, nearly fully coherent pulses at wavelengths as short as 5.9 nm (~211 eV) at the FERMI FEL user facility. Low sensitivity to electron-beam imperfections and observation of stable, narrow-band, coherent emission down to 2.6 nm (~474 eV) make the technique a prime candidate for generating laser-like pulses in the X-ray spectral region, opening the door to multidimensional coherent spectroscopies at short wavelengths. © 2019, The Author(s), under exclusive licence to Springer Nature Limited. (Less)
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https://lup.lub.lu.se/record/0639be98-7c19-4bd7-b736-64d652dddf9e
- author
- Rebernik Ribič, P. ; Pop, Mihai LU and Allaria, E.M.
- author collaboration
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Electron beams, Electron emission, Free electron lasers, Harmonic generation, Phase space methods, X rays, Coherent spectroscopies, Conventional lasers, Electronic transition, Element specificity, Harmonic generation free electron lasers, Nonlinear optical technique, Relativistic electron beam, X-ray free electron lasers, Electrons
- in
- Nature Photonics
- volume
- 13
- pages
- 555 - 561
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85065323288
- ISSN
- 1749-4885
- DOI
- 10.1038/s41566-019-0427-1
- language
- English
- LU publication?
- yes
- additional info
- Export Date: 24 July 2019
- id
- 0639be98-7c19-4bd7-b736-64d652dddf9e
- date added to LUP
- 2019-07-24 14:37:18
- date last changed
- 2022-04-26 03:15:36
@article{0639be98-7c19-4bd7-b736-64d652dddf9e,
abstract = {{X-ray free-electron lasers (FELs), which amplify light emitted by a relativistic electron beam, are extending nonlinear optical techniques to shorter wavelengths, adding element specificity by exciting and probing electronic transitions from core levels. These techniques would benefit tremendously from having a stable FEL source, generating spectrally pure and wavelength-tunable pulses. We show that such requirements can be met by operating the FEL in the so-called echo-enabled harmonic generation (EEHG) configuration. Here, two external conventional lasers are used to precisely tailor the longitudinal phase space of the electron beam before emission of X-rays. We demonstrate high-gain EEHG lasing producing stable, intense, nearly fully coherent pulses at wavelengths as short as 5.9 nm (~211 eV) at the FERMI FEL user facility. Low sensitivity to electron-beam imperfections and observation of stable, narrow-band, coherent emission down to 2.6 nm (~474 eV) make the technique a prime candidate for generating laser-like pulses in the X-ray spectral region, opening the door to multidimensional coherent spectroscopies at short wavelengths. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.}},
author = {{Rebernik Ribič, P. and Pop, Mihai and Allaria, E.M.}},
issn = {{1749-4885}},
keywords = {{Electron beams; Electron emission; Free electron lasers; Harmonic generation; Phase space methods; X rays; Coherent spectroscopies; Conventional lasers; Electronic transition; Element specificity; Harmonic generation free electron lasers; Nonlinear optical technique; Relativistic electron beam; X-ray free electron lasers; Electrons}},
language = {{eng}},
pages = {{555--561}},
publisher = {{Nature Publishing Group}},
series = {{Nature Photonics}},
title = {{Coherent soft X-ray pulses from an echo-enabled harmonic generation free-electron laser}},
url = {{http://dx.doi.org/10.1038/s41566-019-0427-1}},
doi = {{10.1038/s41566-019-0427-1}},
volume = {{13}},
year = {{2019}},
}