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long wave infrared nonlinear cdga 2 the se 4 Crystals and their growth methods and uses

A nonlinear crystal, long-wave infrared technology, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problem of difficult to obtain large size and high optical quality.

Active Publication Date: 2017-12-19
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the results of literature survey, there is no CdGa 2 Se 4 The crystal is regarded as a long-wave infrared nonlinear crystal material, and the growth of the crystal and the performance of the nonlinear application are studied
However, the previous CVT method and co-solvent method were used to prepare CdGa 2 Se 4 Thin films, bulk materials, etc. are used as photosensitive and luminescent materials, and it is difficult to obtain large-size (centimeter-level and above), high optical quality CdGa 2 Se 4 the crystal

Method used

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  • long wave infrared nonlinear cdga <sub>2</sub> the se <sub>4</sub> Crystals and their growth methods and uses
  • long wave infrared nonlinear cdga <sub>2</sub> the se <sub>4</sub> Crystals and their growth methods and uses

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Experimental program
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Embodiment l

[0021] Embodiment 1, synthetic CdGa 2 Se 4 Polycrystalline raw material:

[0022] Mix 30g of Cd, Ga, and Se elemental substances according to the stoichiometric ratio of 1:2:4.05, put them into a carbon-coated φ16mm×20mm quartz tube, and evacuate the quartz tube to 10 -3 Pa and perform fusion sealing. Put the fused-sealed quartz tube into a horizontal synthesis furnace, raise the temperature to 980 °C at a rate of 10 °C / hour, keep the temperature constant for 24 hours, turn off the heating power, and let the polycrystalline synthesis furnace drop to room temperature naturally; take out the sample and grind it into Powdered CdGa2 Se 4 Polycrystalline, polycrystalline dark red.

Embodiment 2

[0023] Embodiment 2, synthetic CdGa 2 Se 4 Polycrystalline raw material:

[0024] Mix 60g of Cd, Ga, and Se elemental substances according to the stoichiometric ratio of 1:2:4.05, put them into a carbon-coated φ20mm×25mm quartz tube, and vacuum the quartz tube to 10 -3 Pa and perform fusion sealing. Put the fused-sealed quartz tube into a horizontal synthesis furnace, raise the temperature to 1020 °C at a rate of 30 °C / hour, keep the temperature constant for 48 hours, turn off the heating power, and let the polycrystalline synthesis furnace drop to room temperature naturally; take out the sample and grind it into Powdered CdGa 2 Se 4 Polycrystalline, polycrystalline dark red.

Embodiment 3

[0025] Embodiment 3, synthetic CdGa 2 Se 4 Polycrystalline raw material:

[0026] Mix 40g of Cd, Ga, and Se elemental substances according to the stoichiometric ratio of 1:2:4.05, put them into a carbon-coated φ20mm×25mm quartz tube, and evacuate the quartz tube to 10 -3 Pa and perform fusion sealing. Put the fused quartz tube into a horizontal synthesis furnace, raise the temperature to 1000 °C at a rate of 50 °C / hour, keep the temperature constant for 36 hours, turn off the heating power supply, and let the polycrystalline synthesis furnace naturally cool down to room temperature; take out the sample and grind it into Powdered CdGa 2 Se 4 Polycrystalline, polycrystalline dark red.

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Abstract

The invention relates to a long wave infrared nonlinear CdGa2Se4 crystal as well as a growth method and the use of the crystal. The CdGa2Se4 polycrystal material is synthesized by virtue of a high-temperature solid-phase reaction; the long wave infrared nonlinear CdGa2Se4 crystal is grown by use of a spontaneous nucleation Bridgman-Stockbarger method or an oriented seed crystal assisted Bridgman-Stockbarger method; the frequency doubling effect of the obtained nonlinear optical CdGa2Se4 crystal powder is about three times of that of AgGaS2, and the transparent waveband of the infrared region of the CdGa2Se4 crystal powder is capable of reaching long wave infrared 21 microns; besides, the CdGa2Se4 crystal powder is good in mechanical properties, stable in chemical properties, not prone to deliquescence, and suitable for orientation, cutting and polishing. The long wave infrared nonlinear CdGa2Se4 crystal is applicable to manufacturing infrared nonlinear optical devices.

Description

technical field [0001] The invention relates to a novel long-wave infrared nonlinear crystal CdGa 2 Se 4 and the CdGa 2 Se 4 single crystal growth method with the CdGa 2 Se 4 The use of single crystals for the fabrication of infrared nonlinear 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 light generated by the laser can be frequency-converted through nonlinear optical devices, so as to obtain more laser light with target wavelengths to meet people's wider applicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B11/00G02F1/355
Inventor 王振友吴海信毛明生倪友保黄昌保肖瑞春戚鸣
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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