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PreprintCC BY 4.0arXiv

Electromagnetic emission at the Langmuir frequency from laser interaction with an unmagnetized plasma

  • J. -R. Marquès
  • F. Pérez
  • P. Loiseau
  • L. Lancia
  • C. Briand
  • S. Depierreux
  • M. Grech
  • C. Riconda
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Abstract

We present the first experimental observation of electromagnetic emission at the Langmuir frequency, ωp, resulting from laser-plasma interaction in an underdense and unmagnetised plasma. The emission is spatially resolved and analyzed in polarization. It originates from an electrostatic wave excited by the Raman instability. Despite its frequency being very close to the plasma's cutoff frequency, ωpe, this radiation can escape the plasma by following the decreasing slope of the plasma density profile. Radiation at 2ωp, is also observed. This experimental platform offers a powerful tool to explore the processes of wave coupling at the origin of some radio solar bursts.

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Cite

BibTeXRIS
BibTeX
@misc{marques2026electromagnetic,
  title = {{Electromagnetic emission at the Langmuir frequency from laser interaction with an unmagnetized plasma}},
  author = {J. -R. Marquès and F. Pérez and P. Loiseau and L. Lancia and C. Briand and S. Depierreux and M. Grech and C. Riconda},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.39864},
  eprint = {2610.39864},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.39864},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Electromagnetic emission at the Langmuir frequency from laser interaction with an unmagnetized plasma
AU  - J. -R. Marquès
AU  - F. Pérez
AU  - P. Loiseau
AU  - L. Lancia
AU  - C. Briand
AU  - S. Depierreux
AU  - M. Grech
AU  - C. Riconda
PY  - 2026
DA  - 2026/10/29
PB  - arXiv
DO  - 10.48550/arxiv.2610.39864
UR  - https://arxiv.org/abs/2610.39864
AB  - We present the first experimental observation of electromagnetic emission at the Langmuir frequency, ω_p, resulting from laser-plasma interaction in an underdense and unmagnetised plasma. The emission is spatially resolved and analyzed in polarization. It originates from an electrostatic wave excited by the Raman instability. Despite its frequency being very close to the plasma's cutoff frequency, ω_pe, this radiation can escape the plasma by following the decreasing slope of the plasma density profile. Radiation at 2ω_p, is also observed. This experimental platform offers a powerful tool to explore the processes of wave coupling at the origin of some radio solar bursts.
ER  -