Periodic striations on beryllium and tungsten surfaces by indirect femtosecond laser irradiation

Journal Article · Mon Mar 10 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4868241· OSTI ID:22257051

Lungu, C. P.; Poroşnicu, C.; Jepu, I.; Lungu, M.; Marcu, A.; Luculescu, C.; Cojocaru, G.; Ursescu, D.; Bănici, R.; Ungureanu, G. R. ^[1]

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1. National Institute for Laser, Plasma and Radiation Physics, 077125 Bucharest (Romania)

Femtosecond laser pulses with λ = 800 nm were focused in air at one atmosphere and in deuterium (D) at low pressure. Submicron periodic structures were observed on surfaces made of Be, W and a mixture of Be-W immersed in these gases and placed nearly parallel with the laser beam, at 300 μm from the focal spot. In air, no structures were observed on Be. For the Be-W mixture, the periodic structures were uniform and parallel when formed in D but irregular in air. In this last case the striations were organized into small patches of 1 to 2 μm in size.

• OSTI ID: 22257051
• Journal Information: Applied Physics Letters, Vol. 104, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIR
BERYLLIUM
DEUTERIUM
LASER RADIATION
LASERS
STRIATIONS
SURFACES
TUNGSTEN