Recoil Effects on Reflection from Relativistic Mirrors in Laser Plasmas
P. Valenta, T. Zh. Esirkepov, J. K. Koga, A. S. Pirozhkov, M. Kando,, T. Kawachi, Y.-K. Liu, P. Fang, P. Chen, J. Mu, G. Korn, O. Klimo, S. V., Bulanov
TL;DR
This paper investigates how intense laser pulses interacting with relativistic plasma mirrors cause recoil effects that influence reflection properties, mirror dynamics, and wave amplification, combining analytical models and particle-in-cell simulations.
Contribution
It introduces a detailed analysis of recoil effects on relativistic plasma mirrors, revealing threshold conditions for mirror splitting and quantifying reflection and amplification factors.
Findings
Recoil effects significantly alter mirror motion at high fluence levels.
Mirror splitting into multiple layers occurs beyond a certain electromagnetic wave threshold.
Reflection coefficient and wave amplification are quantitatively characterized.
Abstract
Relativistic mirrors can be realized with strongly nonlinear Langmuir waves excited by intense laser pulses in underdense plasma. On reflection from the relativistic mirror the incident light affects the mirror motion. The corresponding recoil effects are investigated analytically and with particle-in-cell simulations. It is found that if the fluence of the incident electromagnetic wave exceeds a certain threshold, the relativistic mirror undergoes a significant back reaction and splits into multiple electron layers. The reflection coefficient of the relativistic mirror as well as the factors of electric field amplification and frequency upshift of the electromagnetic wave are obtained.
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