Tabulation of Impurity Absorption Spectra-Ultraviolet and Visible. Volume II.

摘要

The optical-absorption spectra of commonly occurring impurities in several ultraviolet-transparent solids are tabulated and discussed, and the assignments of the absorption bands are reviewed. The wavelength region included extends from the very near infrared, at 1 micrometers (0.124 eV), through the vacuum-ultraviolet region. The host materials covered are LiF, NaF, KCl, MgF2, CaF2, MgO, Al2O3, SiO2, and silicate glasses. The results are presented in a way useful in locating impurities that absorb at specified wavelengths, in determining the wavelength region in which a specific impurity absorbs, and for general use in several current and envisioned programs, including: reducing the residual optical absorption of materials in order to increase the power of ultraviolet and visible lasers and to increase the resistance of materials to damage by high-intensity radiation in laboratory and space environments; understanding the origin of the residual absorption in order to provide guidance for further improvement of materials and to estimate the expected materials limits set by residual imperfections; and reducing the absorptance of dielectric reflectors and antireflection coatings.