Deep-ultraviolet nonlinear optical crystal barium zinc fluorophosphate and preparation method and application thereof
A technology of nonlinear optics and zinc fluorophosphate, applied in the fields of nonlinear optics, chemical instruments and methods, optics, etc., can solve the problems of low frequency multiplication coefficient of crystals, long time consumption, high energy consumption, etc., and achieve good thermal stability , Simple operation, and the effect of reducing energy consumption
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Embodiment 1
[0023] ZnCl 2 , Ba(CH 3 COO) 2 , LiF, H 3 PO 4 , and triethylamine are mixed in a molar ratio of 0.5:1:6:21.9:14.9, placed in a high-pressure hydrothermal reactor, placed in an oven at 210°C, and kept at a constant temperature for 5 days. After natural cooling to room temperature, the product was washed to obtain colorless and transparent crystals. Select one and carry out single crystal X-ray diffraction test. After analysis, the single crystal data is obtained, which belongs to the non-centrosymmetric crystal structure, and is drawn into a crystal structure diagram. See figure 2 , and then the compound was ground into a powder to measure the powder XRD pattern see figure 1 , the measured spectrum is consistent with the theoretically calculated spectrum of the single crystal.
Embodiment 2
[0025] ZnCl 2 , Ba(NO 3 ) 2 , NaF, H 3 PO 4 , Ethylenediamine is mixed in a molar ratio of 1:2:4:21.9:14.9, placed in a high-pressure hydrothermal reactor, placed in an oven at 180°C, and kept at a constant temperature for 3 days. After natural cooling to room temperature, the product was washed to obtain colorless and transparent crystals. After powder X-ray diffraction testing, UV-Vis diffuse reflectance spectroscopy testing, see image 3 , the transmittance at 190nm is 46%, it can be seen that its cut-off absorption edge is below 190nm, which belongs to the deep ultraviolet region, so it can be applied to the laser field of coherent light output in the deep ultraviolet region.
Embodiment 3
[0027] Zn(CH 3 COO) 2 , BaCl 2 , KF, H 3 PO 4 , Tri-n-propylamine is mixed in a molar ratio of 1:1:6:14.6:14.9, placed in a high-pressure hydrothermal reactor, placed in an oven at 240°C, and kept at a constant temperature for 3 days. After natural cooling to room temperature, the product was washed to obtain colorless and transparent crystals. Take 1g sample to screen the particle size grouping and carry out the second harmonic effect test, and use potassium dihydrogen phosphate (KH phosphate) of the same particle size 2 PO 4 , KDP) as a standard sample, get the phase matching diagram see Figure 4 , as the size of the particles increases, the intensity increases accordingly, reaching 0.25 times the KDP intensity at 150-200 μm.
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