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BaHgSe2 nonlinear optical crystal, and preparation method and use thereof

A nonlinear optics and crystal technology, applied in nonlinear optics, optics, crystal growth, etc., can solve problems such as slow development of nonlinear crystals, affecting practical use, and difficulty in crystal growth

Active Publication Date: 2015-12-02
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of nonlinear crystals in the infrared band is relatively slow; the materials in the infrared region are mostly ABC 2 Type chalcopyrite structure semiconductor materials, such as AgGaQ 2 (Q=S, Se, Te), the light damage threshold of infrared nonlinear crystal is too low and the crystal growth is difficult, which directly affects the actual use

Method used

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  • BaHgSe2 nonlinear optical crystal, and preparation method and use thereof
  • BaHgSe2 nonlinear optical crystal, and preparation method and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1——preparation of BaHgSe 2 compound

[0020] BaHgSe 2 The preparation of the compound can be prepared by any one of the following chemical reaction formulas, wherein, after the Hg source material, Ba source material and elemental Se are mixed uniformly according to the ratio of molar ratio Ba:Hg:Se=1:1:2, Heating to 800-1150°C for solid-state reaction (in principle, BaHgSe can be prepared by general chemical synthesis methods 2 Compound; the present invention preferably solid-phase reaction method), just can obtain BaHgSe 2 Compounds, crushed and ground to obtain powdered BaHgSe 2 Compound; The chemical reaction formula is:

[0021] (1) Ba+Hg+2Se=BaHgSe 2 ;

[0022] (2) BaSe+Hg+Se=BaHgSe 2 ;

[0023] (3) Ba+Se+HgSe=BaHgSe 2 ;

[0024] (4) BaSe + HgSe = BaHgSe 2 .

Embodiment 2

[0025] Example 2 - Preparation of BaHgSe by High Temperature Melt Spontaneous Crystallization 2 Nonlinear optical crystal, its specific steps are as follows:

[0026] Weigh 2.796 grams of HgSe and 2.163 grams of BaSe (that is, HgSe: BaSe = 0.01mol: 0.01mol), mix them evenly, put them into a Φ12mm×20mm quartz glass tube, and evacuate to 10 -3 After that, it was packaged with an oxyhydrogen flame and placed in a tube-type growth furnace, raised to 1000°C, kept at a constant temperature for 72 hours, and slowly cooled to room temperature at a rate of 1°C / h, and the tube-type growth furnace was closed; after the quartz tube cooled, cut Open, black crystals can be obtained.

[0027] Certainly also can directly use the BaHgSe that embodiment 1 prepares 2 Preparation of BaHgSe from compound by high temperature melt spontaneous crystallization method 2 Nonlinear Optical Crystals: Powdered BaHgSe 2 After the compound is heated to melt to obtain a melt and kept for 24-96 hours, it i...

Embodiment 3

[0028] Embodiment 3, adopts crucible drop method to prepare BaHgSe 2 Crystal:

[0029] Weigh 5.591 grams of HgSe and 4.326 grams of BaSe (Ba:Hg:Se=0.02mol:0.02mol:0.04mol), mix them uniformly, put them into a quartz glass tube of Φ25mm×200mm, and evacuate to 10 -3 After that, it is packaged with an oxyhydrogen flame and placed in a crystal growth furnace, and slowly raised to 1000°C to melt the raw material. After the raw material is completely melted, the growth device drops vertically at a speed of 0.1-10mm / hour; after the crystal growth is completed, the growth It took 50 hours for the device to cool down to room temperature to obtain black BaHgSe 2 crystals.

[0030] Certainly also can directly use the BaHgSe that embodiment 1 prepares 2 Compound prepared BaHgSe by crucible drop method 2 Nonlinear Optical Crystals: Powdered BaHgSe 2 Put the compound into a Φ25mm×200mm quartz glass tube, and evacuate to 10 -3 After that, it is packaged with an oxyhydrogen flame and pl...

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Abstract

A BaHgSe2 nonlinear optical crystal has no symmetric center, and belongs to an orthorhombic system, the space group is Pmc21, and cell parameters of the crystal are characterized in that a is 0.436nm, b is 1.488nm, c is 0.759nm, alpha = beta = gamma = 90DEG, and Z = 4. A preparation method of the BaHgSe2 nonlinear optical crystal allows crystals to grow through adopting a high temperature melt spontaneous crystallization process or a Bridgman-Stockbarger method; and the crystals have the advantages of fast growth speed, low cost, and easy obtaining of crystals with large dimension in the growth process of the BaHgSe2 nonlinear optical crystal. The obtained BaHgSe2 nonlinear optical crystal has the advantages of large nonlinear optical effects, wide optical transparency waveband, large hardness, good mechanical performances and easy processing, and can be used to make a nonlinear optical device, and the device comprises a device allowing at least one beam of incident electromagnetic radiation to go through at least one BaHgSe2 nonlinear optical crystal in order to generate at least one beam of output radiation with the frequency different from the frequency of the incident electromagnetic radiation.

Description

technical field [0001] The present invention relates to a kind of BaHgSe 2 Nonlinear optical crystals (BaHgSe 2 single crystal) and the BaHgSe 2 The preparation method of nonlinear optical crystal and the BaHgSe 2 The nonlinear optical crystal is used for making nonlinear optical devices. Background technique [0002] Crystals with nonlinear optical effects are called nonlinear optical crystals. Here nonlinear optical effects refer to effects such as frequency doubling, sum frequency, difference frequency, and parametric amplification. Nonlinear optical effects are only possible in crystals that do not have a center of symmetry. Using the nonlinear optical effect of crystals, nonlinear optical devices such as second harmonic generators, up and down frequency converters, and optical parametric oscillators can be made. The laser generated by the laser can be frequency converted by nonlinear optical devices, so as to obtain more useful wavelengths of laser light, so that ...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B11/00G02F1/355
CPCC30B11/00C30B29/46G02F1/355
Inventor 姚吉勇李超李小双周墨林张国春吴以成
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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