Durable solgel antireflective films with high laser-induced damage thresholds for inertial confinement fusion Article

Xu, Y, Zhang, L, Wu, D et al. (2005). Durable solgel antireflective films with high laser-induced damage thresholds for inertial confinement fusion . 22(4), 905-912. 10.1364/JOSAB.22.000905



cited authors

  • Xu, Y; Zhang, L; Wu, D; Sun, YH; Huang, ZX; Jiang, XD; Wei, XF; Li, ZH; Dong, BZ; Wu, ZH

fiu authors

abstract

  • We tested the use of two hydrophobic methyl-substituted silane precursors, methyltriethoxysilane and dimethyldiethoxysilane, to synthesize methyl-modified silica sales by a two-step method and a cohydrolysis method to produce durable antireflective films with high laser-induced-damage thresholds (LIDTs). Using small-angle x-ray scattering technology, we obtained details of the microstructure of clusters in sol and found various double fractal structural characteristics in the methyl-modified silica clusters; our findings were confirmed by transmission-electron micrographs. Through a 29Si magic-angle spin nuclear magnetic resonance study of the corresponding xerogels, we determined the double-fractal microstructure, which we then related to the LIDTs of AR films. The distribution configuration of methyls in clusters determined the double-fractal microstructure of clusters and then the LIDTs or AR films. The LIDTs of films produced by the cohydrolysis method (the highest was 38 J/cm2 for 1-ns, 1064-nm laser action) were much higher than those from the two-step method because of the loose netlike clusters in the former configuration. During the 220-day aging, the transmittance of hydrophobic AR film decreased ∼0.2%. So it is practicable to prepare durable AR films with higher LIDTs than those of normal AR SiO"2 films only by introducing hydrophobic methyls into a Si-O-Si matrix of clusters if an appropriate hydrophobic precursor is chosen. © 2005 Optical Society of America.

publication date

  • January 1, 2005

Digital Object Identifier (DOI)

start page

  • 905

end page

  • 912

volume

  • 22

issue

  • 4