Optical spectra of Pb implanted fused silica

The extinction coefficient over the spectral range of 1.8–6.2 eV and the infrared reflectance over the 5000 cm −1 to 75 cm −1 range were measured for a series of Pb ion-implanted high-purity silica substrates. The samples were implanted at room temperature with an energy of 320 keV for nominal doses of 1, 3 and 6 × 10 16 ions/cm 2. A sample implanted with a nominal dose of 6 × 10 16 ions/cm 2 was annealed in air at 800°C for 1 h. The Pb ions form both elemental Pb and PbO particles in the as-implanted state. The extent of formation for each chemical state is dose-dependent. Upon annealing, the elemental Pb and PbO particles form a lead silicate phase in the implanted layer that is similar to conventionally prepared bulk lead silicate glasses.