Efficiently accelerated free electrons by metallic laser accelerator

Dingguo Zheng, Siyuan Huang, Jun Li, Yuan Tian, Yongzhao Zhang, Zhongwen Li, Huanfang Tian, Huaixin Yang and Jianqi Li ()
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Dingguo Zheng: Chinese Academy of Sciences
Siyuan Huang: Chinese Academy of Sciences
Jun Li: Chinese Academy of Sciences
Yuan Tian: Chinese Academy of Sciences
Yongzhao Zhang: Chinese Academy of Sciences
Zhongwen Li: Chinese Academy of Sciences
Huanfang Tian: Chinese Academy of Sciences
Huaixin Yang: Chinese Academy of Sciences
Jianqi Li: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract Strong electron-photon interactions occurring in a dielectric laser accelerator provide the potential for development of a compact electron accelerator. Theoretically, metallic materials exhibiting notable surface plasmon-field enhancements can possibly generate a high electron acceleration capability. Here, we present a design for metallic material-based on-chip laser-driven accelerators that show a remarkable electron acceleration capability, as demonstrated in ultrafast electron microscopy investigations. Under phase-matching conditions, efficient and continuous acceleration of free electrons on a periodic nanostructure can be achieved. Importantly, an asymmetric spectral structure in which the vast majority of the electrons are in the energy-gain states has been obtained by means of a periodic bowtie-structure accelerator. Due to the presence of surface plasmon enhancement and nonlinear optical effects, the maximum acceleration gradient can reach as high as 0.335 GeV/m. This demonstrates that metallic laser accelerator could provide a way to develop compact accelerators on chip.

Date: 2023
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DOI: 10.1038/s41467-023-41624-9

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