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Applied Optics

Applied Optics


  • Vol. 38, Iss. 21 — Jul. 20, 1999
  • pp: 4720–4724

Surface Damage of Extreme-Ultraviolet Gratings Exposed to High-Energy 20-fs Laser Pulses

Paolo Ceccherini, Maria-G. Pelizzo, Paolo Villoresi, Sandro De Silvestri, Mauro Nisoli, and Salvatore Stagira  »View Author Affiliations

Applied Optics, Vol. 38, Issue 21, pp. 4720-4724 (1999)

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The damage fluences of gratings for diffraction of ultraviolet radiation, which are used in high-order harmonic generation experiments, have been measured with respect to the fundamental laser beam radiation. We have tested gold and platinum coatings of 40- and 50-nm thickness, respectively, deposited onto fused-silica substrates, after irradiation of high-energy, spatially filtered, 20-fs laser pulses at 780 nm. The damage appears at a fluence of ~0.3 J cm<sup>−2</sup> for gold and at a fluence of ~0.4 J cm<sup>−2</sup> for platinum. Scanning electron microscopy of the irradiated regions revealed different damaging mechanisms for the two coatings.

© 1999 Optical Society of America

OCIS Codes
(230.1950) Optical devices : Diffraction gratings
(320.2250) Ultrafast optics : Femtosecond phenomena
(350.1820) Other areas of optics : Damage

Paolo Ceccherini, Maria-G. Pelizzo, Paolo Villoresi, Sandro De Silvestri, Mauro Nisoli, and Salvatore Stagira, "Surface Damage of Extreme-Ultraviolet Gratings Exposed to High-Energy 20-fs Laser Pulses," Appl. Opt. 38, 4720-4724 (1999)

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