NONLINEAR OPTICAL AND PHOTOLUMINESCENT MATERIAL OF RARE EARTH SAMARIUM SCANDOBORATE AND METHOD FOR SYNTHESIS THEREOF Russian patent published in 2021 - IPC C09K11/78 C09K11/63 G02F1/355 C30B29/10 C30B9/12 C01B35/12 C01F17/241 C01F17/30 C04B35/50 

FIELD: optics.

SUBSTANCE: invention relates to production of environmentally sustainable light sources and luminophores. The nonlinear optical and photoluminescent material of rare earth samarium scandoborate with a composition Sm_0,78Sc_3,22(BO₃)₄ of a non-centrosymmetrical monoclinic structure has the spatial group Cc with the lattice parameters a=7.6819 Å, b=9.8088 Å, c=11.9859 Å, β=105.11, provides second-harmonic generation with pumping at the wavelength of 1,064 nm and emits light from 550 nm to 750 nm. In order to produce said material by the spontaneous crystallisation method, an initial mixture is prepared, consisting of the components Sm_0,78Sc_3,22(BO₃)₄, taken in the ratio Sm:SC = 0.3:0.7, containing samarium oxide Sm₂O₃, scandium oxide Sc₂O₃, boric acid H₃BO₃, lithium carbonate Li₂CO₃, lithium fluoride LiF, and flux components taken in the ratio 0.59LiBO₂:0.41LiF. The initial mixture is heated to 1,000°C to produce a melt solution whereto a platinum loop is introduced. The temperature is reduced at a rate of 20°C / h until the first crystals appear, and spontaneous crystals are grown in the range of 910 to 870°C at a rate of temperature reduction of 2°C /day.

EFFECT: invention provides a possibility of expanding the range of materials exhibiting nonlinear optical and photoluminescent properties based on rare earth samarium scandoborates with a stable structure.

2 cl, 3 dwg, 1 ex