EPITAXIAL GROWTH OF ALKALINE EARTH FLUORIDE FILMS ON Si SUBSTRATES.

The authors review the growth conditions, properties, and applications of epitaxial alkaline earth fluoride films on Si substrates. The lattice mismatches of CaF//2, SrF//2, and BaF//2 to Si are about 0. 6%, 6. 8%, and 14. 2% at room temperature, respectively. The films are grown by molecular beam epitaxy or vacuum-deposition onto heated substrates, in which molecular beams of the fluorides are formed by evaporating polycrystalline fluoride grains.