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- Title
Fabrication of micrometre-sized periodic gratings in free-standing metallic foils for laser–plasma experiments.
- Authors
Gheorghiu, C. C.; Cerchez, M.; Aktan, E.; Prasad, R.; Yilmaz, F.; Yilmaz, N.; Popa, D.; Willi, O.; Leca, V.
- Abstract
Engineered targets are expected to play a key role in future high-power laser experiments calling for joined, extensive knowledge in materials properties, engineering techniques and plasma physics. In this work, we propose a novel patterning procedure of self-supported 10 μm thick Au and Cu foils for obtaining micrometre-sized periodic gratings as targets for high-power laser applications. Accessible techniques were considered, by using cold rolling, electron-beam lithography and the Ar-ion milling process. The developed patterning procedure allows efficient control of the grating and foil surface on large area. Targets consisting of patterned regions of 450 μm × 450 μm, with 2 μm periodic gratings, were prepared on 25 mm × 25 mm Au and Cu free-standing foils, and preliminary investigations of the micro-targets interacting with an ultrashort, relativistic laser pulse were performed. These test experiments demonstrated that, in certain conditions, the micro-gratings show enhanced laser energy absorption and higher efficiency in accelerating charge particle beams compared with planar thin foils of similar thickness.
- Subjects
COLD rolling; PLASMA physics; PARTICLE beams; ULTRASHORT laser pulses; LASER pulses; ALUMINUM foil; LASER plasmas; SURFACE area
- Publication
High Power Laser Science & Engineering, 2022, Vol 10, p1
- ISSN
2095-4719
- Publication type
Article
- DOI
10.1017/hpl.2021.57