Infrared Nonlinear Optics Single Crystal GaSn

Abstract

The invention discloses the synthesis and application of an infrared nonlinear optical single crystal gallium tin selenide. The molecular formula of the single crystal is: SnGa4Se7, the molecular weight is 950.31, it belongs to the monoclinic system, the space group Pc, and the unit cell parameter is a=7.577(4)b=6.666(3)c=13.023(8)(19)α=γ=90 °, β=106.680(7)°, V=630.1(6)Z=2. It is prepared by vacuum-sealed quartz tube and graphite crucible high-temperature reaction method. Gallium tin selenide crystals have excellent infrared nonlinear optical properties. According to experimental measurements, the SHG intensity of its powder (particle size 90-109 μm) is about 2.5 times that of the corresponding particle size AgGaS2 and meets the type I phase matching.

Description

technical field [0001] The invention belongs to infrared nonlinear optical crystal material and its preparation. Background technique [0002] Nonlinear optical crystal materials, we can mainly divide them into three categories: 1. Nonlinear optical materials in ultraviolet and deep ultraviolet bands; 2. Nonlinear optical materials in visible light and near-infrared bands; 3. Infrared and mid-far infrared nonlinear optical materials Material. The work of the present invention mainly focuses on infrared and mid-to-far infrared nonlinear optical materials, which have a wide range of potential uses in civil and military applications, such as laser devices, infrared band laser frequency doubling, infrared laser radar, laser communication, infrared filter devices , photoelectric countermeasures, etc. [0003] So far, the generation of 3-20 μm solid-state mid- and far-infrared lasers is mainly based on the principle of nonlinear optics and infrared nonlinear optical crystal freq...

AI Technical Summary

Problems solved by technology

These crystals have been used in the high-tech fields of civilian production and life and military equipment, but these crystal materials also have their own shortcomings, and they cannot meet people's ideal requirements in terms of comprehensive performance. With the development of technology and the improvement of requirements, it is necessary to Infrared nonlinear crystals with better performance. Therefore, the exploration of new mid- and far-infrared nonlinear crystals has important strategic significance in the civilian high-tech industry and the improvement of military equipment, and it is also a challenge for the synthesis and growth of crystal materials.

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