Dielectric laser accelerators (DLAs) have proven to be good candidates for miniaturized particle accelerators. They rely on micro-fabricated dielectrics which are able to modulate the kinetic energy of the incoming electron beam under a proper laser illumination. In this paper we demonstrate a dual pillar structure with a distributed Bragg reflector to mimic a double sided illumination to the electron path. The structure is fabricated by an electron beam lithography technique followed by a cryogenic reactive ion etching process. Such a structure can accelerate the injected 28 keV electrons by a gradient of approximately 150 MeV/m which can be further optimized towards the GeV/m regime.
@article{arxiv.1801.05234,
title = {Silicon dual pillar structure with a distributed Bragg reflector for dielectric laser accelerators: Design and fabrication},
author = {Peyman Yousefi and Joshua McNeur and Martin Kozák and Uwe Niedermayer and Florentina Gannott and Olga Lohse and Oliver Boine-Frankenheim and Peter Hommelhoff},
journal= {arXiv preprint arXiv:1801.05234},
year = {2018}
}