Abstract

In this paper, a periodic structure of different dielectric layers is proposed and investigated for relativistic electron acceleration. The periodic dielectric structure provides an accelerating electric field inside the structure. Results show that the electron beam can experience a strong electric force in one direction during propagation in the structure, leading to the acceleration gradient increasing by more than double in comparison with dual-grating structures. Acceleration gradient enhancement occurs without increasing the electric field much inside the structure; therefore, the maximum achievable acceleration gradient and acceleration factor are increased by more than 100%, reaching 0.7. Thereby, by using the proposed structure GV/m, the acceleration gradient can be achieved with a wide electron channel. Also, the required input laser fluence is reduced for the same acceleration gradient. Acceleration gradient and acceleration factor optimization is done corresponding to structure parameters. Our work shows that the proposed structure helps to make dielectric laser accelerators more efficient.

© 2021 Optical Society of America

Two-axis dielectric laser acceleration using two orthogonal laser pulses in a dual-grating base structure

Ehsan Shojaie, Khosro Madanipour, and Alireza Bahrampour
Appl. Opt. 59(7) 2135-2140 (2020)

Dual-grating dielectric accelerators driven by a pulse-front-tilted laser

Y. Wei, M. Ibison, G. Xia, J. D. A. Smith, and C. P. Welsch
Appl. Opt. 56(29) 8201-8206 (2017)

Design of a tapered slot waveguide dielectric laser accelerator for sub-relativistic electrons

Zhexin Zhao, Tyler W. Hughes, Si Tan, Huiyang Deng, Neil Sapra, R. Joel England, Jelena Vuckovic, James S. Harris, Robert L. Byer, and Shanhui Fan
Opt. Express 26(18) 22801-22815 (2018)

Diamond-based dielectric laser acceleration

Tomas Chlouba, Roy Shiloh, Pontus Forsberg, Mathias Hamberg, Mikael Karlsson, Martin Kozák, and Peter Hommelhoff
Opt. Express 30(1) 505-510 (2022)

Particle acceleration using top-illuminated nanophotonic dielectric structures

R. Shiloh, T. Chlouba, P. Yousefi, and P. Hommelhoff
Opt. Express 29(10) 14403-14411 (2021)