On parallel laser beam merger in plasmas

K. V. Lezhnin, Kenan Qu, N. J. Fisch, S. V. Bulanov

Research output: Contribution to journalArticlepeer-review


Self-focusing instability is a well-known phenomenon of nonlinear optics, which is of great importance in the field of laser-plasma interactions. Self-focusing instability leads to beam focusing and, consequently, breakup into multiple laser filaments. The majority of applications tend to avoid a laser filamentation regime due to its detrimental role on laser spot profile and peak intensity. In our work, using nonlinear Schrödinger equation solver and particle-in-cell simulations, we address the problem of interaction of multiple parallel beams in plasmas. We consider both non-relativistic and moderately relativistic regimes and demonstrate how the physics of parallel beam interaction transitions from the familiar self- and mutual-focusing instabilities in the non-relativistic regime to a moderately relativistic regime, where an analytical description of filament interaction is not available.

Original languageEnglish (US)
Article number032114
JournalPhysics of Plasmas
Issue number3
StatePublished - Mar 1 2024

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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