Large-angle stimulated Raman scattering induced by transverse density modulation

Huang Z. M.; Wang Qing; Cheng R. J.; Li X. X.; Lv S. Y.; Liu D. J.; Xu Z. Y.; Zhang S. T.; Chen Z. J.; Wang Qiang; Xiao C. Z.; Liu Z. J.; Cao L. H.; Zheng C. Y.; He X. T.

doi:10.1063/5.0278141

Volume 10 Issue 5

Sep. 2025

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Article Navigation > Matter and Radiation at Extremes > 2025 > 10(5): 057403

Huang Z. M., Wang Qing, Cheng R. J., Li X. X., Lv S. Y., Liu D. J., Xu Z. Y., Zhang S. T., Chen Z. J., Wang Qiang, Xiao C. Z., Liu Z. J., Cao L. H., Zheng C. Y., He X. T.. Large-angle stimulated Raman scattering induced by transverse density modulation[J]. Matter and Radiation at Extremes, 2025, 10(5): 057403. doi: 10.1063/5.0278141

Citation:

Huang Z. M., Wang Qing, Cheng R. J., Li X. X., Lv S. Y., Liu D. J., Xu Z. Y., Zhang S. T., Chen Z. J., Wang Qiang, Xiao C. Z., Liu Z. J., Cao L. H., Zheng C. Y., He X. T.. Large-angle stimulated Raman scattering induced by transverse density modulation[J]. Matter and Radiation at Extremes, 2025, 10(5): 057403. doi: 10.1063/5.0278141

Citation:

Huang Z. M., Wang Qing, Cheng R. J., Li X. X., Lv S. Y., Liu D. J., Xu Z. Y., Zhang S. T., Chen Z. J., Wang Qiang, Xiao C. Z., Liu Z. J., Cao L. H., Zheng C. Y., He X. T.. Large-angle stimulated Raman scattering induced by transverse density modulation[J]. Matter and Radiation at Extremes, 2025, 10(5): 057403. doi: 10.1063/5.0278141

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Large-angle stimulated Raman scattering induced by transverse density modulation

doi: 10.1063/5.0278141

Huang Z. M.^1
,,
Wang Qing^1
,,
Cheng R. J.^1
,,
Li X. X.^1
,,
Lv S. Y.^1
,,
Liu D. J.^1
,,
Xu Z. Y.^1
,,
Zhang S. T.^1
,,
Chen Z. J.^2
,,
Wang Qiang¹,
Xiao C. Z.^3
,,
Liu Z. J.^{1, 2
,
,
,},
Cao L. H.^{1, 2
,},
Zheng C. Y.^{1, 2
,},
He X. T.^{1, 2
,}

1.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, People’s Republic of China
2.
Center for Applied Physics and Technology, HEDPS, and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People’s Republic of China
3.
Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, People’s Republic of China

More Information

Corresponding author: a)Author to whom correspondence should be addressed: liuzj@iapcm.ac.cn
Received Date: 2025-04-28
Accepted Date: 2025-08-14

Available Online: 2025-11-28

Publish Date: 2025-09-01

Abstract

Abstract

Large-angle stimulated Raman scattering (LA-SRS) in a longitudinally inhomogeneous plasma with a transverse density modulation is studied using a three-wave coupled model and numerical simulations. The simulations show that the scattering angle of SRS in a longitudinally inhomogeneous plasma can be significantly affected by transverse density modulation. Under transverse density modulation conditions, the laser focuses into underdense regions, owing to the transversely modulated refractive index. The angle of LA-SRS, neither a purely 90° angle side scattering nor purely backscattering, is almost consistent with the specific angle at which the density inhomogeneity vanishes. In modulated plasmas, the nonuniform distribution of laser intensity shifts the regions of scattering and gain compared with those in uniform plasmas, ultimately affecting the laser transmission. SRS is suppressed in weakly modulated regimes, whereas it is enhanced under strong modulation conditions, and a theoretical criterion distinguishing between strong and weak modulation is established.

The authors have no conflicts to disclose.
Conflict of Interest
Author Contributions
Z. M. Huang: Conceptualization (equal); Data curation (equal); Formal analysis (lead); Investigation (equal); Methodology (equal); Validation (equal); Visualization (equal); Writing – original draft (equal); Writing – review & editing (equal). Qing Wang: Conceptualization (equal); Data curation (equal); Formal analysis (equal); Investigation (lead); Writing – review & editing (equal). R. J. Cheng: Conceptualization (lead); Investigation (equal); Methodology (equal); Visualization (equal); Writing – review & editing (equal). X. X. Li: Conceptualization (equal); Investigation (equal); Methodology (equal); Writing – review & editing (equal). S. Y. Lv: Conceptualization (equal); Methodology (equal); Writing – review & editing (equal). D. J. Liu: Methodology (equal); Validation (equal); Writing – review & editing (equal). Z. Y. Xu: Investigation (equal); Methodology (equal); Writing – review & editing (equal). S. T. Zhang: Investigation (equal); Writing – review & editing (equal). Z. J. Chen: Investigation (equal); Methodology (equal); Writing – review & editing (equal). Qiang Wang: Supervision (equal); Validation (equal); Writing – review & editing (equal). C. Z. Xiao: Methodology (equal); Supervision (equal); Visualization (equal); Writing – review & editing (equal). Z. J. Liu: Funding acquisition (equal); Investigation (equal); Methodology (equal); Project administration (equal); Resources (equal); Software (equal); Supervision (equal); Validation (equal); Writing – review & editing (equal). L. H. Cao: Investigation (equal); Supervision (equal); Writing – review & editing (equal). C. Y. Zheng: Investigation (equal); Methodology (equal); Supervision (equal); Visualization (equal); Writing – review & editing (equal). X. T. He: Conceptualization (equal).
The data that support the findings of this study are available from the corresponding author upon reasonable request.

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References(44)

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