In the past years, there has been a growing interest in innovative applications of radially polarized laser beams. Among them, the particular field of laser-driven electron acceleration has received much attention. Recent developments in high-power infrared laser sources at the INRS Advanced Laser Light Source (Varennes, Qc, Canada) allowed the experimental observation of a quasi-monoenergetic 23-keV electron beam produced by a radially polarized laser pulse tightly focused into a low density gas. Theoretical analyses suggest that the production of collimated attosecond electron pulses is within reach of the actual technology. Such an ultrashort electron pulse source would be a unique tool for fundamental and applied research. In this paper, we propose an overview of this emerging topic and expose some of the challenges to meet in the future.
Varin, C., Payeur, S., Marceau, V., Fourmaux, S., April, A., Schmidt, B., … Piché, M. (2013). Direct Electron Acceleration with Radially Polarized Laser Beams. Applied Sciences, 3(1), 70–93. https://doi.org/10.3390/app3010070