Radially polarized, half-cycle, attosecond pulses from laser wakefields through coherent synchrotronlike radiation

F. Y. Li, Z. M. Sheng, M. Chen, L. L. Yu, J. Meyer-ter-Vehn, W. B. Mori, J. Zhang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Attosecond bursts of coherent synchrotronlike radiation are found when driving ultrathin relativistic electron disks in a quasi-one-dimensional regime of wakefield acceleration, in which the laser waist is larger than the wake wavelength. The disks of overcritical density shrink radially due to focusing wakefields, thus providing the transverse currents for the emission of an intense, radially polarized, half-cycle pulse of about 100 attoseconds in duration. The electromagnetic pulse first focuses to a peak intensity (7×10^20W/cm^2) 10 times larger than the driving pulse and then emerges as a conical beam. Basic dynamics of the radiative process are derived analytically and in agreement with particle-in-cell simulations. By making use of gas targets instead of solids to form the ultrathin disks, this method allows for high repetition rates required for applications.
LanguageEnglish
Article number043104
Number of pages7
JournalPhysical Review E
Volume90
Issue number4
DOIs
Publication statusPublished - 23 Oct 2014

Fingerprint

coherent radiation
Radiation
Laser
Cycle
cycles
pulses
lasers
electromagnetic pulses
Wake
Burst
wakes
repetition
bursts
Transverse
Electron
Wavelength
Target
Cell
cells
gases

Keywords

  • attosecond pulses
  • laser wakefields
  • ultrathin disks

Cite this

Li, F. Y. ; Sheng, Z. M. ; Chen, M. ; Yu, L. L. ; Meyer-ter-Vehn, J. ; Mori, W. B. ; Zhang, J. / Radially polarized, half-cycle, attosecond pulses from laser wakefields through coherent synchrotronlike radiation. In: Physical Review E. 2014 ; Vol. 90, No. 4.
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abstract = "Attosecond bursts of coherent synchrotronlike radiation are found when driving ultrathin relativistic electron disks in a quasi-one-dimensional regime of wakefield acceleration, in which the laser waist is larger than the wake wavelength. The disks of overcritical density shrink radially due to focusing wakefields, thus providing the transverse currents for the emission of an intense, radially polarized, half-cycle pulse of about 100 attoseconds in duration. The electromagnetic pulse first focuses to a peak intensity (7×10^20W/cm^2) 10 times larger than the driving pulse and then emerges as a conical beam. Basic dynamics of the radiative process are derived analytically and in agreement with particle-in-cell simulations. By making use of gas targets instead of solids to form the ultrathin disks, this method allows for high repetition rates required for applications.",
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Radially polarized, half-cycle, attosecond pulses from laser wakefields through coherent synchrotronlike radiation. / Li, F. Y.; Sheng, Z. M.; Chen, M.; Yu, L. L.; Meyer-ter-Vehn, J. ; Mori, W. B.; Zhang, J.

In: Physical Review E, Vol. 90, No. 4, 043104, 23.10.2014.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Li, F. Y.

AU - Sheng, Z. M.

AU - Chen, M.

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AU - Meyer-ter-Vehn, J.

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AB - Attosecond bursts of coherent synchrotronlike radiation are found when driving ultrathin relativistic electron disks in a quasi-one-dimensional regime of wakefield acceleration, in which the laser waist is larger than the wake wavelength. The disks of overcritical density shrink radially due to focusing wakefields, thus providing the transverse currents for the emission of an intense, radially polarized, half-cycle pulse of about 100 attoseconds in duration. The electromagnetic pulse first focuses to a peak intensity (7×10^20W/cm^2) 10 times larger than the driving pulse and then emerges as a conical beam. Basic dynamics of the radiative process are derived analytically and in agreement with particle-in-cell simulations. By making use of gas targets instead of solids to form the ultrathin disks, this method allows for high repetition rates required for applications.

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KW - ultrathin disks

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