METHOD FOR PRODUCING PHOTOREFRACTIVE MATERIALS

摘要

The invention relates to a method for producing photorefractive materials, embodied in the form of nonstoichiometric chemical compounds of a general formula [Ag3 <2+>] x [Ag2O] n [P2O5] m [Al2O3] k [B2O3] l [R2O] p [R'O] s [Ln2O3] t (I), wherein x=0.000005-0.01, n=0.0005-0.1, m=0.4-0.75, k=0-0.1, l=0-0.1, p=0-0.5, s=0-0.5,t=0-0.25, R=Li, Na, K, Rb, Cs; R'=Mg, Ca, Sr, Ba; Ln=La, Er, Yb, Nd, Tb, Ce. The inventive method consists in exposing a compound (II) [Ag2O] n [P2O5] m [Al2O3] k [B2O3] l [R2O] p [R'O] s [Ln2O3] t, wherein n=0.0005-0.1, m=0.4-0.75, k=0-0.1, l=0-0.1, p=0-0.5, s=0-0.5,t=0-0.25, R=Li, Na, K, Rb, Cs; R'=Mg, Ca, Sr, Ba; Ln=La, Er, Yb, Nd, Tb, Ce, to the action of a pulse UV radiation whose wavelength ranges from 150 to 300 nm, pulse length is less than 20 nanoseconds and pulse energy density is higher than 10 <2> J/cm<2>.