Speaker
Description
Dielectric laser accelerator (DLA) is a novel acceleration scheme using dielectric nanostructures with high damage thresholds for the laser electric field. In DLA, the typical structural period is determined by the product of the Lorentz factor β and the laser wavelength λ. At low β, the structural period becomes extremely small, making fabrication impractical and limiting the range of initial energies that can be accelerated. In fact, DLA has so far been demonstrated only for initial energies above approximately 10 keV [1–3]. We design DLA structures that extend the range of initial kinetic energy that can be accelerated to lower energies. By setting the structural period to an odd multiple of βλ and specifically employing a 3βλ structure in this work, the fabrication constraints associated with low initial energies can be improved. As a result, acceleration is driven by enhanced third-order Fourier components of the laser field generated during transmission through the pillars, rather than by the original incident laser component. In this presentation, we will report on a pillar cross-sectional design capable of accelerating low-energy electrons (5 keV) based on acceleration simulations.
Footnotes
[1] J. McNeur, et al., Journal of Physics B: Atomic, Molecular and Optical Physics, 49, 3, 034006 (2016).
[2] P. Yousefi, et al., Optics letters, 4, 6, 1520-1523(2019).
[3] L. Brückner, et al., Optics Express 32, 28348-28355 (2024).
| Paper status | Proceeding files received |
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