Photochemical Hole Burning Storage Material
Original Publication Date: 1980-Dec-01
Included in the Prior Art Database: 2005-Feb-14
A material for use in a photochemical hole burning storage memory of the type described in U.S. Patent 4,101,976 is calcium fluoride (CaF(2)), which contains an F(3) color center. This material exhibits a strong inhomogeneously broadened zero-phonon line at 6774 angstroms that has an inhomogeneous width of approx. 20 GHz. Holes approx. 50 MHz wide have been burned in this material while it was kept at liquid helium temperatures. The holes were stable for several hours without any change in their depth. The wavelength suitable for burning holes in this material is accessible by semiconductor lasers, for example, GaAlAs.