The use of etched nuclear tracks to create a gradient-index antireflective
surface on fused silica was investigated. Fission fragments were used as the
nuclear particles. The long-wavelength antireflectivity achieved was broadband
but modest, possibly because of large index gradients at the internal and
external surfaces. Transmission at short wavelengths was limited by diffuse
surface scatter. Laser damage thresholds were high. Residual radioactivity was
significant but tolerable for some applications. A theory of the index profile
of the porous surface was developed.
© 1984 Optical Society of America
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