Simulation of seed electric field isosurfaces for pulses containing high orbital angular momentum harmonics driven by stimulated Raman backscattering in a plasma (plasma not shown). The pulses have 1 lobe (top) and 2 lobes (bottom).
From the article:
High Orbital Angular Momentum Harmonic GenerationJ. Vieira, R. M. G. M. Trines, E. P. Alves, R. A. Fonseca, J. T. Mendonça, R. Bingham, P. Norreys, and L. O. Silva
Phys. Rev. Lett. 117, 265001 (2016)
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