Inverse Cherenkov dielectric laser accelerator for ultra-relativistic particles

作者：Liwen Zhang, Weihao Liu, Yucheng Liu, Qika Jia, Baogen Sun, Hongliang Xu, Shengguang Liu · 发表于：Journal of Physics D Applied Physics · 年份：2022 · DOI：10.1088/1361-6463/acaaba · 被引用次数：12 · 研究领域：Advanced Fiber Laser Technologies、Laser-Plasma Interactions and Diagnostics、Laser-Matter Interactions and Applications

Abstract Recently, the laser-driven dielectric particle accelerator based on the inverse Cherenkov effect has aroused great interest, because it provides an option for developing desktop or even on-chip particle accelerators. So far, only sub-relativistic cases have been investigated. Previous studies showed that when the particle velocity reaches ultra-relativistic range, the acceleration gradient of an inverse Cherenkov laser-driven dielectric accelerator with a single-side dielectric structure drops sharply. Here we illustrate that, by using a double-sided dielectric structure, a high acceleration gradient for ultra-relativistic particles can still be obtained. In addition, we find that, in the ultra-relativistic region, the acceleration gradient increases (not decreases) with the increase of particle energy. The single-sided and double-sided accelerator models under unilateral and bilateral laser-driven conditions are investigated in detail. The results obtained are important for developing an inverse Cherenkov laser-driven dielectric accelerator for both sub-relativistic and ultra-relativistic regions.