Second order nonlinear optical crystal material, preparation method and use thereof

Abstract

The invention discloses second-order nonlinear optical crystal material, a molecular formula of the crystal material is NaSb3F10 and a crystal space group is P63. The material is characterized in that a comparatively big second-order nonlinear optical coefficient which is capable of phase-matching is provided; large transmitted windows are provided in an ultraviolet area, a visible light area and an infrared light area; the material has good thermal stability. The synthetic method is that NaF and Sb2O3 with the metage of 2:3 of the molar ratio are added to 40 percent HF acid water solution, which is stirred until the solution is transparent, then the solution is filtered; the filtrate is placed in a thermostatic bath at the temperature of 30-50 DEG C; after 10-30 days, transparent crystal in the shape of hexagonal prism is obtained. The second-order nonlinear optical crystal material has the advantages that the operation is simple; the reaction time is short; the experiment condition is mild; the production purity is high; the crystal with good quality and big size can be generated by a simple solvent volatility method; the crystal material can be extensively applied to optics field and the fields such as dielectric, ferroelectric, pyroelectricity, piezoelectricity, etc.

Description

technical field [0001] The invention relates to an inorganic nonlinear optical crystal material, which belongs to the field of inorganic chemistry, and also belongs to the field of material science and optics. Background technique [0002] Nonlinear optical effects originate from the interaction between laser and medium. When the laser propagates in a medium with non-zero second-order polarizability, nonlinear optical effects such as frequency doubling, sum frequency, difference frequency, parametric oscillation and amplification will occur. Using the second-order nonlinear optical effect of crystals, nonlinear optical devices such as second-harmonic generators, frequency converters, and optical parametric oscillators can be made, which have important applications in many fields, such as laser technology and national defense. value. Inorganic nonlinear optical materials play a dominant role in the practical research of second-order nonlinear optical materials. According t...

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Problems solved by technology

The semiconductor material has a small band gap, although the nonlinear optical coefficient is large, it is also easy to cause laser damage

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