Silicon buried gratings for dielectric laser electron accelerators

This paper describes design and simulations of dielectric laser electron accelerators that achieve Gigavolt-per-meter (GV/m) accelerating gradients and wide electron channels (>1 μm). The accelerator design is based on a silicon buried grating structure that enables flexible phase synchronization...

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Bibliographic Details
Published in:Applied physics letters 2014-05, Vol.104 (18)
Main Authors: Chang, Chia-Ming, Solgaard, Olav
Format: Article
Language:English
Subjects:
ACCELERATORS
Applied physics
Buried structures
DIELECTRIC MATERIALS
Electron accelerators
ELECTRONS
GRATINGS
LASERS
MATERIALS SCIENCE
Pulsed lasers
SILICON
Standing wave ratios
STANDING WAVES
Synchronism
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Summary:This paper describes design and simulations of dielectric laser electron accelerators that achieve Gigavolt-per-meter (GV/m) accelerating gradients and wide electron channels (>1 μm). The accelerator design is based on a silicon buried grating structure that enables flexible phase synchronization, large electron channel fields, and low standing-wave ratio in the material. This design increases the accelerating gradients to more than double those of reported quartz grating accelerators, thereby reducing the input laser fluence by 60% for the same accelerating gradient. With a 100 fs pulsed laser, our silicon buried gratings can achieve a maximum gradient of 1.1 GV/m, indicating that these accelerators have potential for numerous electron-accelerator applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4875957