Theoretical analysis of chirped pulse effects on plasma formation in water liquid jet
https://doi.org/10.17586/2220-8054-2026-17-1-26-33
Abstract
We present a theoretical study of how linear chirp controls plasma density in a water jet using a two-stage framework. Stage I solves carrier-population and current equations at a single point, driven by a chirped super-Gaussian pulse. By fixing bandwidth and normalizing for intensity, we isolate a chirp-only response of plasma density, which exceeds unity and shows a consistent advantage for negative over positive chirp. Stage II propagates the field in water via the angular-spectrum method and applies the same equations across space. Normal dispersion reverses the trend: the chirp-only plasma density decreases as chirp grows, negative chirp remains less detrimental, and suppression is strongest for longer FTL pulses (e.g., 80 fs) due to dispersion-induced temporal spreading and spatio-temporal desynchronization. This study separates spectralphase effects from bandwidth and intensity, yields testable predictions for water jets, and provides a foundation for future experiments and self-consistent propagation models.
Supporting agencies: This work was supported by the Ministry of Science and Higher Education of the Russian Federation (No. FSER-2025–0007)
About the Authors
Sh. Hilal
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Russian Federation
Russian Federation
Shireen Hilal
St. Petersburg
A. O. Ismagilov
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Russian Federation
Russian Federation
Azat O. Ismagilov
St. Petersburg
A. N. Tcypkin
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Russian Federation
Russian Federation
Anton N. Tsypkin
St. Petersburg
M. V. Melnik
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Russian Federation
Russian Federation
Maksim V. Melnik
St. Petersburg
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Review
For citations:
Hilal Sh., Ismagilov A.O., Tcypkin A.N., Melnik M.V. Theoretical analysis of chirped pulse effects on plasma formation in water liquid jet. Nanosystems: Physics, Chemistry, Mathematics. 2026;17(1):26-33. https://doi.org/10.17586/2220-8054-2026-17-1-26-33
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