Publications associated with Laser Fusion and Extreme Field Science

Amplification and generation of ultra-intense twisted laser pulses via stimulated Raman scattering

Nature Communications Nature Publishing 7 (2016) Article 10371-

J Vieira, RMGM Trines, EP Alves, RA Fonseca, JT Mendon�a, R Bingham, P Norreys, LO Silva

Twisted Laguerre–Gaussian lasers, with orbital angular momentum and characterized by doughnut-shaped intensity profiles, provide a transformative set of tools and research directions in a growing range of fields and applications, from super-resolution microcopy and ultra-fast optical communications to quantum computing and astrophysics. The impact of twisted light is widening as recent numerical calculations provided solutions to long-standing challenges in plasma-based acceleration by allowing for high-gradient positron acceleration. The production of ultra-high-intensity twisted laser pulses could then also have a broad influence on relativistic laser–matter interactions. Here we show theoretically and with ab initio three-dimensional particle-in-cell simulations that stimulated Raman backscattering can generate and amplify twisted lasers to petawatt intensities in plasmas. This work may open new research directions in nonlinear optics and high–energy-density science, compact plasma-based accelerators and light sources.

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