Cerium fluorosulfate second-order nonlinear optical crystal material as well as preparation method and application thereof

A second-order nonlinear and optical crystal technology, applied in nonlinear optics, polycrystalline material growth, chemical instruments and methods, etc., to achieve mild conditions, large-scale industrial production, and simple methods

Active Publication Date: 2021-06-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, maximizing these two optical parameters simultaneously is very challenging since they have different requirements on the microstructure

Method used

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  • Cerium fluorosulfate second-order nonlinear optical crystal material as well as preparation method and application thereof
  • Cerium fluorosulfate second-order nonlinear optical crystal material as well as preparation method and application thereof
  • Cerium fluorosulfate second-order nonlinear optical crystal material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Hydrothermal synthesis of samples

[0031] Mix cerium source, sulfur source, fluorine source and water according to a certain ratio to form starting materials, seal them in a hydrothermal reaction kettle with a polytetrafluoroethylene liner, raise the temperature to the crystallization temperature, keep the temperature for a period of time, Slowly lower the temperature of the reaction system to room temperature, filter and wash to obtain transparent blocky cerium fluorosulfate crystals.

[0032] The relationship between the types and proportions of raw materials in the initial mixture, crystallization temperature, crystallization time and sample number is shown in Table 1.

[0033] Table 1 Correspondence between samples, raw materials and synthesis conditions

[0034]

Embodiment 2

[0036] Crystal structure analysis

[0037] The structures of samples 1# to 6# were analyzed by single crystal X-ray diffraction and powder X-ray diffraction.

[0038] The single crystal X-ray diffraction test was carried out on a D8VENTURE CMOS X-type X-ray single crystal diffractometer from Bruker, Germany. The crystal size is 0.12×0.07×0.06mm 3 ; The data collection temperature is 293K, and the diffraction light source is Mo-Kα ray monochromated by graphite The scanning method is ω; the data is processed by the Multi-Scan method for absorption correction. Structural analysis was completed using the SHELXTL-97 program package; the position of the heavy atom was determined by the direct method, and the coordinates of the remaining atoms were obtained by the difference Fourier synthesis method; 2 The full-matrix least-squares method was used to refine all atomic coordinates and anisotropic thermal parameters.

[0039] The powder X-ray diffraction test was carried out on th...

Embodiment 3

[0045] UV Diffuse Reflectance Spectroscopy Test

[0046] The diffuse reflection absorption spectrum test of sample 1# was carried out on a Cary 5000 UV-Vis-NIR spectrophotometer of Agilent Corporation, USA. The result is as image 3 shown by image 3 It can be seen that the compound has no significant absorption in the range of 460nm to 2500nm. The compound has a wide optical transmission range and an optical band gap of 2.71eV.

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Abstract

The invention relates to a cerium fluorosulfate second-order nonlinear optical crystal material as well as a preparation method and application thereof. The chemical formula of the crystal material is CeF2(SO4), the molecular weight is 274.18, the crystal material belongs to an orthorhombic system, the space group of the crystal material is Pca21, the cell parameters are alpha=beta=gamma=90 degrees, and Z is equal to 4. The cell volume of the crystal material is compared with that of the prior art, the powder SHG coefficient of the crystal CeF2(SO4) under 1064nm laser irradiation is 8.0 times that of KH2PO4(KDP), and phase matching can be achieved under 1064nm laser irradiation. In addition, the birefringence of the crystal breaks through the birefringence limit of the oxide at the position of 0.361 at 546 nm.

Description

technical field [0001] The invention belongs to the fields of inorganic chemistry, crystallography and nonlinear optical materials, and specifically relates to an inorganic rare earth metal fluorosulfate nonlinear optical crystal cerium fluorosulfate and its preparation and application. Background technique [0002] Nonlinear optical crystal materials with second-harmonic (SHG) properties play a vital role in modern laser science and technology because of their frequency-converting ability to extend the output spectral range of laser sources. An ideal excellent NLO material needs to have a large SHG response and an efficient birefringence to achieve phase matching in a specific light transmission window. However, maximizing these two optical parameters simultaneously is very challenging because of their different requirements on the microstructure. For example, NLO crystal SrB 4 o 7 Exhibits a strong SHG response originating from the tetrahedron [BO 4 ] unit’s structural...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B7/10G02F1/355
CPCC30B29/46C30B7/10G02F1/3551
Inventor 张弛吴天辉吴超
Owner TONGJI UNIV
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