Dielectric laser electron acceleration in a dual pillar grating with a distributed Bragg reflector.
Opt Lett
; 44(6): 1520-1523, 2019 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-30874691
We report on the efficacy of a novel design for dielectric laser accelerators by adding a distributed Bragg reflector (DBR) to a dual pillar grating accelerating structure. This mimics a double-sided laser illumination, resulting in an enhanced longitudinal electric field while reducing the deflecting transverse effects when compared to single-sided illumination. We improve the coupling efficiency of the incident electric field into the accelerating mode by 57%. The 12 µm long structures accelerate sub-relativistic 28 keV electrons with gradients of up to 200 MeV/m in theory and 133 MeV/m in practice. This Letter shows how lithographically produced nano-structures help to make novel laser accelerators more efficient.
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01-internacional
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MEDLINE
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En
Revista:
Opt Lett
Año:
2019
Tipo del documento:
Article
Pais de publicación:
Estados Unidos