A gallium-containing nonlinear optical crystal material and its synthesis method and application

A technology of crystal materials and raw materials, applied in the field of gallium-containing nonlinear optical crystal materials and their synthesis, can solve the problems of inability to meet the requirements of high-power laser development, two-photon absorption, low laser damage threshold, etc. Linear optical performance, performance improvement effect

Active Publication Date: 2022-02-18
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong absorption of chemical bonds in the mid-to-far infrared region, oxide materials cannot be used in this band
At present, the existing commercial mid-to-far infrared NLO materials are chalcogenide or phosphorus compounds, mainly AgGaS 2 ,AgGaSe 2 ,ZnGeP 2 etc., they have the advantages of large NLO coefficient and wide infrared transmission range, but there are disadvantages such as low laser damage threshold or two-photon absorption, which cannot meet the requirements of high-power laser development

Method used

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  • A gallium-containing nonlinear optical crystal material and its synthesis method and application
  • A gallium-containing nonlinear optical crystal material and its synthesis method and application
  • A gallium-containing nonlinear optical crystal material and its synthesis method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The preparation of embodiment 1 crystal sample

[0060] Sample 1# (Cs 2 Li 2 Ga 3 S 6 Cl) crystal synthesis

[0061] After Ba (71mg), Li (6mg), Ga (56mg), S (153mg) and CsCl (192mg) were mixed evenly, they were put into a quartz tube and evacuated to 10 -2 Seal the tube with pa, put it in a muffle furnace and heat it to 1000°C, keep it warm for 72 hours, then cool it down to 400°C after 5°C / h, turn off the muffle furnace and cool it down to room temperature naturally, and the chemical formula is Cs 2 Li 2 Ga 3 S 6 The colorless crystal of Cl is recorded as sample 1#.

[0062] Sample 2# (Rb 2 Li 2 Ga 3 Se 6 Cl) crystal synthesis

[0063] After Ba (46mg), Li (5mg), Ga (69mg), Se (181mg) and RbCl (168mg) are mixed evenly, put into a quartz tube and evacuate to 10 -2 Seal the tube with pa, put it into the muffle furnace and heat it slowly to 800°C, after 96 hours of heat preservation, after cooling down to 350°C after 3°C / h, turn off the muffle furna...

Embodiment 2

[0071] The structural characterization of embodiment 2 sample

[0072] X-ray powder diffraction phase analysis and single crystal X-ray diffraction test were carried out for samples 1# to 4#. X-ray Powder Diffraction Phase Analysis (PXRD) Data were collected using a Rigaku MiniFlex600 powder diffractometer, irradiated in reflection mode using a Cu-Kα target The current is 100mA and the voltage is 30KV. The test temperature is 293K, the range of 2θ angle is 5-65°, and the scanning step width is 0.02°. Single crystal X-ray diffraction tests were performed using a Rigaku Pilatus CCD single crystal diffractometer, data were collected at 293K, and X-rays were emitted using a Mo-Kα target equipped with a graphite monochromator Intensity data collection uses ω-sweeping technology, and data reduction uses Rigaku CrysAlisPro software.

[0073] Structural analysis of the crystal material obtained above:

[0074] sample 1 # The cell parameters of are: α=β=γ=90°, Z=2;

[007...

Embodiment 3

[0085] The frequency doubling performance test of embodiment 3 sample

[0086] The specific steps of the frequency doubling experiment of samples 1# to 4# are as follows: use the laser with a wavelength of 1910nm generated by OPO technology as the fundamental frequency light, irradiate the crystal powder to be tested, and use the charge-coupled device to detect the generated second harmonic of 955nm. Intensity, the sample to be tested and the standard sample AgGaS 2 Grind separately, and use a standard sieve to screen crystals of different particle sizes, the particle sizes are 30-50um, 50-75um, 75-100um, 100-150um and 150-200um. Observe the change trend of the frequency multiplier signal with the particle size, and judge whether it can achieve phase matching. Under the same conditions, compare the intensity of the second harmonic generated by the sample with that of the reference crystal AgGaS 2 The intensity of the second harmonic generated, thus obtaining the relative size...

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Abstract

The application discloses a crystal material, its synthesis method and its application in nonlinear optics. The crystalline material has a 2 Li 2 Ga 3 Q 6 The chemical formula of X, wherein, A is selected from at least one of K, Rb, and Cs; Q is selected from S or Se; X is selected from Cl or Br. The crystal material is synthesized by a high-temperature solid-phase method. The crystal material has excellent infrared nonlinear optical properties, and the nonlinear effect is the commercial AgGaS 2 0.3‑2.0 times the laser damage threshold of commercial AgGaS 2 3‑25 times, the performance has been greatly improved, and it is a potential infrared nonlinear optical material.

Description

technical field [0001] The crystal material of the application belongs to the field of nonlinear optical materials, and specifically relates to a gallium-containing nonlinear optical crystal material and its synthesis method and application. Background technique [0002] Nonlinear optics (NLO) crystal materials have important applications in military and civilian fields (such as laser communication, laser detection, laser therapy, etc.). After decades of exploration and development, oxides such as β-BaB 2 o 4 , LiB 3 o 5 、KH 2 PO 4 、KTiOPO 4 NLO crystal materials such as NLO have basically met the needs of laser development in the visible and near-infrared bands. However, due to the strong absorption of chemical bonds in the mid-to-far infrared region, oxide materials cannot be used in this band. At present, the existing commercial mid-to-far infrared NLO materials are chalcogenide or phosphorus compounds, mainly AgGaS 2 ,AgGaSe 2 ,ZnGeP 2 etc., they have the adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B1/10C30B28/02C30B29/12
CPCC30B1/10C30B28/02C30B29/12
Inventor 刘彬文郭国聪姜小明徐忠宁曾卉一
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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