A kind of mid-infrared nonlinear optical crystal, its preparation method and application

A technology of nonlinear optics and nonlinear crystals, applied in chemical instruments and methods, crystal growth, self-solid, etc., can solve problems such as low laser damage threshold and cannot meet the needs of practical applications, and achieve excellent second-order nonlinear optical properties Effect

Active Publication Date: 2018-04-10
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

[0004] Existing infrared nonlinear commercial materials (such as ZnGeP 2 , AgGaS 2 , LiGaS 2 , LiInS 2 ) have their own defects such as low laser damage threshold, which cannot meet the growing practical application requirements

Method used

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  • A kind of mid-infrared nonlinear optical crystal, its preparation method and application
  • A kind of mid-infrared nonlinear optical crystal, its preparation method and application
  • A kind of mid-infrared nonlinear optical crystal, its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0045] The preparation of embodiment 1 sample

[0046] BaCl 2 , metal barium powder, metal M, metal gallium powder and selenium powder are mixed evenly according to a certain ratio to obtain the raw material; the raw material is put into a graphite crucible; the graphite crucible with the raw material is placed in a quartz reaction tube, and the vacuum is pumped to 10 -2 Pa and use a hydrogen-oxygen flame to melt and seal the quartz reaction tube. Put the quartz reaction tube into a tube furnace with a temperature controller, heat it to the solid melting temperature, and keep it for a period of time. Then the temperature is programmatically lowered to 300° C. at a speed not exceeding 5° C. / hour, then the heating is stopped, and the nonlinear optical crystal material is obtained by naturally cooling to room temperature.

[0047] The sample number, raw material ratio, solid solution temperature and holding time are shown in Table 1.

[0048] Table 1

[0049]

Embodiment 2

[0050] The structural characterization of embodiment 2 sample

[0051] sample 1 # ~6 # The X-ray single crystal diffraction was carried out on a Mercury CCD type single crystal diffractometer, Mo target, Kα radiation source (λ=0.07107nm), test temperature 293K. And through Shelxtl97 for structural analysis. The crystallographic data results of each sample are shown in Table 2, and the schematic diagram of the crystal structure is shown in figure 1 shown.

[0052] Table 2 Sample 1 # ~6 # The crystallographic data of

[0053]

[0054] It can be seen that sample 1 # ~6 # have the same crystal structure, and the structure is mainly composed of a three-dimensional grid structure formed by symmetrical T1 tetrahedra and T2 hypertetrahedrons alternately connected to each other by sharing Se, Ba 2+ and Cl - Fill in the cavities of the 3D mesh. where T1 is MSe 4 6- Tetrahedral, T2 is composed of four GaSe 4 5- Tetrahedral [Ga 4 Se 10 ] 8- .

[0055] sample 1 # ~6 ...

Embodiment 3

[0056] Optical property characterization of embodiment 3 sample

[0057] sample 1 # ~6 # The optical properties of the optical properties were characterized on a Nicolet Magna 750FT-IR infrared spectrometer and a PE Lambda900 ultraviolet-visible (near-infrared) absorption or diffuse reflectance spectrometer, and the results are shown in Table 3.

[0058] sample 1 # ~4 # light transmission properties such as Figure 4 As shown, the multiplier performance is as Figure 5 As shown, the fluorescence performance as Figure 6 shown.

[0059] It can be seen that the 1 obtained by the effective dual-ion cooperative substitution method provided by the present application # ~6 # The sample realizes the compound function of the material. For example, Ba 4 Cu 0.5 Ga 4.5 Se 10 Cl 2 The compound has achieved second-order nonlinearity (under 2.05 μm laser excitation, its powder frequency doubling intensity is 39 times that of AGS) and the emission wavelength of the T1-T2 skelet...

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Abstract

The application discloses a nonlinear crystal material with strong infrared frequency-doubling response, its preparation method and application. The nonlinear crystal material has a molecular formula as shown below: Ba4MGa4Se10Cl2 Wherein, M is a metal element, at least one selected from group IIB metal elements, VIIB group metal elements, and VIII group metal elements or M is composed of IB group metal elements At least one of the group IIIA metal elements; the crystal belongs to the tetragonal crystal system, the space group is the powder frequency doubling strength of the material can reach 59 times that of the commercial material AgGaS2, and can be used for photoelectric countermeasures, resource detection, space anti-missile and communications.

Description

technical field [0001] The application relates to a multi-functional material capable of realizing compound functionalization of mid-infrared nonlinear optical materials and a preparation method thereof, belonging to the field of inorganic nonlinear optical materials. Background technique [0002] Nonlinear optical crystals are crystals that exhibit secondary or higher nonlinear optical effects in response to strong laser electric fields. It has nonlinear optical effects such as laser frequency doubling, difference frequency, multiple frequency doubling, parametric oscillation and amplification, and has played an increasingly important role in laser technology, military and civilian applications. [0003] According to their light-transmitting wavelength range, nonlinear optical crystals can be divided into three categories: ultraviolet, visible and infrared. Among them, some crystals in the ultraviolet and visible regions (such as KH 2 PO 4 (KDP), KTiOPO 4 (KTP),β-BaB 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B1/10H01L31/09
Inventor 陈玲黎艳艳吴立明
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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