Plasma and Fusion Research

Volume 11, 2401071 (2016)

Regular Articles

Formation Mechanism of a Periodic Nanograting Structure by a Surface Plasma Wave
Amany Moustafa GOUDA, Hitoshi SAKAGAMI1), Tomoya OGATA, Masaki HASHIDA2) and Shuji SAKABE2)
Department of Physics, Nagoya University, Nagoya 464-8602, Japan
1)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
2)
Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
(Received 30 November 2015 / Accepted 4 February 2016 / Published 13 July 2016)

Abstract

A two-dimensional particle in cell code has been used to demonstrate the formation mechanism of a periodic nanograting structure in the hydrogen plasma. By using a linearly polarized, ultrafast laser beam with a wavelength of 800 nm, an incidence angle of 0°, and an intensity of 1016 W/cm2–μm2, the periodic nanograting structure was clearly self-organized at the boundary between a preformed and dense plasma at t = 600 fs. The bidirectional surface plasma wave plays a significant role together with the oscillating two-stream instability in producing the periodic nanograting structure.

Keywords

periodic nanograting structure, laser, plasma, laser plasma interaction, surface plasma wave, ponderomotive force, oscillating two-stream instability

DOI: 10.1585/pfr.11.2401071

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