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Crystal material, method for preparing same and application of crystal material used as infrared nonlinear optical material

A technology of crystal materials and raw materials, applied in the field of nonlinear optical materials, can solve the problems such as the inability to meet the development requirements of nonlinear optical crystal materials, the inability to apply the mid-far infrared band range, and the low laser damage threshold, and achieve excellent infrared nonlinear optics. Performance, nonlinear optics performance improvement, simple steps effect

Active Publication Date: 2016-09-21
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since these materials contain oxygen, there are vibrational excitations in the infrared band, so they cannot be used in the mid-to-far infrared range.
The existing materials used in the mid-to-far infrared band mainly include AgGaS 2 , AgGaSe 2 and ZnGeP 2 etc. Although these materials have a large nonlinear coefficient and a wide transmission range in the infrared region, they have disadvantages such as low laser damage threshold or two-photon absorption, which cannot meet the practical development of nonlinear optical crystal materials. requirements

Method used

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  • Crystal material, method for preparing same and application of crystal material used as infrared nonlinear optical material
  • Crystal material, method for preparing same and application of crystal material used as infrared nonlinear optical material
  • Crystal material, method for preparing same and application of crystal material used as infrared nonlinear optical material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Sample 1 # ~Sample 5 # preparation of

[0032] After mixing barium sulfide, cadmium powder, tin powder and sulfur powder evenly, place them in a quartz reaction tube and vacuumize to 10 -4 Torr (Torr) and fused with a hydrogen-oxygen flame to seal the quartz reaction tube. Put the quartz reaction tube into the muffle furnace, heat it to the solid solution temperature, and keep it for a period of time. Then, after cooling down to a certain temperature with a certain cooling rate program, turn off the muffle furnace and cool down to room temperature naturally, and the red crystal obtained is the crystal material.

[0033] Table 1 shows the sample number, raw material dosage, solid melting temperature, holding time, cooling rate and programmed cooling temperature.

[0034] Table 1

[0035]

Embodiment 2

[0036] Example 2 Sample 1 # ~Sample 5 # structural representation of

[0037] sample 1 # ~Sample 5 # X-ray powder diffraction phase analysis (XRD) after grinding was carried out on MiniFlex II X-ray diffractometer of Rigaku Company, Cu target, Kα radiation source (λ=0.154184nm). The results show that the samples prepared in Example 1 are all samples with high purity and high crystallinity.

[0038] sample 1 # ~Sample 5 # It has similar powder XRD patterns, that is, the same diffraction peak position and shape, and the relative peak intensity fluctuates within ±5%, indicating that sample 1 # ~Sample 5 # have the same crystal structure.

[0039] sample 1 # ~Sample 5 # The X-ray single crystal diffraction was carried out on a Rigaku Pilatus type single crystal diffractometer, Mo target, Kα radiation source (λ=0.07107nm), test temperature 293K. And through Shelxtl97 for structural analysis. Take sample 1 # As a typical representative, the XRD diffraction pattern obtai...

Embodiment 3

[0043] Example 3 Sample 1 # The frequency doubling test experiment

[0044] For sample 1 # Carry out the frequency doubling experiment test, the specific steps are as follows:

[0045] Using the laser with a wavelength of 1750nm generated by the optical parametric amplification technology (OPO) as the fundamental frequency light, the crystal powder to be tested is irradiated, and the intensity of the 875nm second harmonic generated by the charge-coupled device (CCD) is used to detect the intensity of the second harmonic wave to be tested. Sample and standard sample AgGaS 2 Grind separately, and use standard sieves to sieve crystals of different particle sizes, the particle sizes are 30-50 μm, 50-75 μm, 75-100 μm, 100-150 μm, 150-200 μm and 200-250 μm. 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 samp...

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Abstract

The invention discloses a crystal material. The crystal material is characterized in that a chemical formula of the crystal material is BaCdSnS4; the crystal material belongs to Fdd2 space groups of orthorhombic crystal systems. The crystal material has the advantages that the crystal material can be used as a nonlinear optical crystal, nonlinear effects of the crystal materials are 1-5 times nonlinear effects of commercial AgGaS2, a laser induced damage threshold of the crystal material is 1-8 times a laser induced damage threshold of the commercial AgGaS2, and the crystal material is a novel intermediate and far infrared nonlinear crystal material with a large nonlinear coefficient and the high laser induced damage threshold.

Description

technical field [0001] The application relates to a crystal material, a preparation method and an application as an infrared nonlinear optical material, belonging to the field of nonlinear optical materials. Background technique [0002] Nonlinear optical crystal materials can be divided into three categories according to their transmission bands and application ranges: nonlinear optical materials in ultraviolet and deep ultraviolet bands, nonlinear optical materials in visible light and near-infrared bands, and mid-to-far infrared nonlinear optical materials. At present, nonlinear optical crystal materials with excellent performance such as: KH 2 PO 4 (KDP), KTiOPO 4 (KTP),β-BaB 2 o 4 (BBO), LiB 3 o 5 (LBO), etc., are mostly suitable for the ultraviolet-visible light region and near-infrared light region. Because these materials contain oxygen, there is vibration excitation in the infrared band, so they cannot be used in the middle and far infrared band range. The e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46C30B1/10G02F1/355
CPCC30B1/10C30B29/46G02F1/3551
Inventor 李淑芳郭国聪姜小明刘彬文曾卉一徐忠宁
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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