Sub GV/cm terahertz radiations from relativistic laser-solid interaction via coherent transition radiation

W. J. Ding, Z. M. Sheng

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Broadband terahertz (THz) radiation with extremely high peak power, generated by the interaction of a femtosecond laser with a thin solid target, has been investigated via particle-in-cell simulations. The spatial (angular) and temporal profiles of the THz radiation reveal that it is caused by the coherent transition radiation emitted when laser-produced hot electrons pass through the front or rear surface of the target. Dependence of the THz radiation on laser and target parameters is studied; it is shown to have a strong correlation with hot electron production. The THz radiation conversion efficiency can be as high as a few times 10−3. This radiation is not only a potentially high power THz source, but may also be used as a unique diagnostic of hot electron generation and transport in relativistic laser-solid interactions.
LanguageEnglish
Article number063204
Number of pages9
JournalPhysical Review E
Volume93
Issue number6
DOIs
Publication statusPublished - 13 Jun 2016

Fingerprint

Radiation
Laser
radiation
hot electrons
Interaction
lasers
interactions
Electron
Target
Femtosecond Laser
High Power
Broadband
Diagnostics
broadband
Cell
profiles
cells
Simulation
simulation

Keywords

  • laser plasma
  • broadband terahertz
  • electromagnetic waves
  • THz radiation

Cite this

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abstract = "Broadband terahertz (THz) radiation with extremely high peak power, generated by the interaction of a femtosecond laser with a thin solid target, has been investigated via particle-in-cell simulations. The spatial (angular) and temporal profiles of the THz radiation reveal that it is caused by the coherent transition radiation emitted when laser-produced hot electrons pass through the front or rear surface of the target. Dependence of the THz radiation on laser and target parameters is studied; it is shown to have a strong correlation with hot electron production. The THz radiation conversion efficiency can be as high as a few times 10−3. This radiation is not only a potentially high power THz source, but may also be used as a unique diagnostic of hot electron generation and transport in relativistic laser-solid interactions.",
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Sub GV/cm terahertz radiations from relativistic laser-solid interaction via coherent transition radiation. / Ding, W. J.; Sheng, Z. M.

In: Physical Review E, Vol. 93, No. 6, 063204, 13.06.2016.

Research output: Contribution to journalArticle

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AU - Ding, W. J.

AU - Sheng, Z. M.

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AB - Broadband terahertz (THz) radiation with extremely high peak power, generated by the interaction of a femtosecond laser with a thin solid target, has been investigated via particle-in-cell simulations. The spatial (angular) and temporal profiles of the THz radiation reveal that it is caused by the coherent transition radiation emitted when laser-produced hot electrons pass through the front or rear surface of the target. Dependence of the THz radiation on laser and target parameters is studied; it is shown to have a strong correlation with hot electron production. The THz radiation conversion efficiency can be as high as a few times 10−3. This radiation is not only a potentially high power THz source, but may also be used as a unique diagnostic of hot electron generation and transport in relativistic laser-solid interactions.

KW - laser plasma

KW - broadband terahertz

KW - electromagnetic waves

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