Selenium-silicon-silver-barium compound and selenium-silicon-silver-barium middle and far infrared non-linear optical crystal as well as preparation method and application thereof

A nonlinear optics and far-infrared technology, applied in chemical instruments and methods, crystal growth, elemental compounds other than selenium/tellurium, etc., can solve the problem of low laser damage threshold, two-photon absorption is not easy to obtain large-scale high-quality single crystal, it is difficult to output mid- and far-infrared lasers, etc., and achieve the effect of large laser damage threshold, excellent optical performance, and strong nonlinear optical effect
CN107399722AActive Publication Date: 2017-11-28XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
Publication Date
2017-11-28

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Abstract

The invention relates to a selenium-silicon-silver-barium compound, a selenium-silicon-silver-barium middle and far infrared non-linear optical crystal as well as a preparation method and application thereof. A chemical formula of the compound is BaAg2SiSe4, molecular weight of the compound is 697.01, the crystal is a tetragonal crystal system, a space group is of a non-centrosymmetry type (described in the specification), cell parameters comprise that a=b=7.066(3) angstrom, c=8.233(7) angstrom, alpha=beta=gamma=90 degrees and Z=2, and unit cell volume V=411.1(5) angstrom<3>. The preparation method comprises the step of carrying out solid-phase reaction on simple substances barium, silver, silicon and selenium under vacuum condition. Powder XRD spectra of the selenium-silicon-silver-barium compound and the selenium-silicon-silver-barium middle and far infrared non-linear optical crystal are consistent with theoretical values; and under irradiation of lasers with the wavelength of 2090nm, and frequency doubling effect of BaAg2SiSe4 with the granularity of 55-88 Mum is two times that of AgGaS2 with the same granularity.
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Description

technical field

[0001] The invention belongs to the field of infrared nonlinear optical crystal materials, and specifically relates to a selenium-silicon-silver-barium and mid-far infrared nonlinear optical crystal, a preparation method and an application thereof. Background technique

[0002] As a high-intensity, directional coherent monochromatic light source, laser is widely used in scientific research, industry, transportation, national defense, medical and health and other related fields. However, the laser wave bands directly output by various lasers at present are limited, and there are still blank laser wave bands from the ultraviolet band to the infrared band. Due to the particularity of the laser generation mechanism, it is impossible to find a practical laser medium for every wavelength. Therefore, the use of nonlinear optical crystals for frequency conversion to obtain various laser sources with wide tuning has become a frontier topic in the development of laser...

Claims

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