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LiGaGe2Se6 compound, LiGaGe2Se6 nonlinear optical crystals, and preparation method and application thereof

A nonlinear optics, compound technology, applied in nonlinear optics, selenium/tellurium compounds, chemical instruments and methods, etc., can solve the problems of difficult crystal growth, affecting practical use, slow development of nonlinear crystals, etc.

Active Publication Date: 2012-12-26
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 practical use

Method used

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  • LiGaGe2Se6 compound, LiGaGe2Se6 nonlinear optical crystals, and preparation method and application thereof
  • LiGaGe2Se6 compound, LiGaGe2Se6 nonlinear optical crystals, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, prepare powdery LiGaGe 2 Se 6 Compound:

[0042] Using Li 2 Se+Ga 2 Se 3 +4 GeSe 2 =2LiGaGe 2 Se 6 Preparation of LiGaGe by solid state reaction method 2 Se 6 compound;

[0043] The Li 2 Se is 0.928 g, the Ga 2 Se 3 3.763 g, the GeSe 2 It is 9.221 grams; that is, Li 2 Se:Ga 2 Se 3 : GeSe 2 =0.01mol:0.01mol:0.04mol;

[0044] The specific operation steps are as follows: weigh the reagents in the glove box according to the above dosage, put them into the mortar, mix and grind them carefully, then put them into a Φ12mm×20mm quartz tube, and evacuate them to 10 -3 After pa, the quartz tube was melted and packaged with a hydrogen-oxygen flame, put into a muffle furnace, and slowly raised to 800°C, the heating rate was 50°C / hour, and the temperature was kept constant for 48 hours. After cooling, take it out. At this time, the sample is relatively loose, so take it out The sample is re-ground and mixed, then placed in a quartz tube and vacuum-pa...

Embodiment 2

[0045] Embodiment 2, prepare powdery LiGaGe 2 Se 6 Compound:

[0046] Using Li 2 Se+2Ga+4Ge+11Se=2LiGaGe 2 Se 6 Reaction formula to prepare LiGaGe by solid state reaction method 2 Se 6 Compound; The Li 2 Se is 0.928 grams, the Ga is 1.394 grams, the Ge is 2.904 grams, and the Se is 8.686 grams, namely Li 2 Se:Ga:Ge:Se=0.01mol:0.02mol:0.04mol:0.11mol;

[0047] The specific operation steps are: weigh the reagents according to the above dosage in the glove box, put them into the mortar, mix and carefully grind them, then put them into a Φ12mm×20mm quartz tube, and vacuum to 10 -3 After pa, melt and package the quartz tube with a flame, put it in a muffle furnace, and slowly raise it to 900°C, the heating rate is 10°C / hour, keep the temperature for 48 hours, take it out after cooling, at this time the sample is loose, take out the sample again Grind and mix well, then put it in a quartz tube and vacuumize it, and sinter it in a muffle furnace at 900°C for 24 hours. At thi...

Embodiment 3

[0048] Embodiment 3, prepare powdery LiGaGe 2 Se 6 Compound:

[0049] Using Li 2 Se+Ga 2 Se 3 +4Ge+8Se=2LiGaGe 2 Se 6 Reaction formula to prepare LiGaGe by solid state reaction method 2 Se 6 Compound; The Li 2 Se is 0.928 g, the Ga 2 Se 3 is 3.763 grams, the Ge is 2.904 grams, and the Se is 6.317 grams, namely Li 2 Se:Ga 2 Se 3 : Ge: Se=0.01mol: 0.01mol: 0.04mol: 0.08mol;

[0050] The specific operation steps are as follows: weigh the reagents in the glove box according to the above dosages, put them into a mortar, mix and carefully grind them, then put them into a Φ12mm×20mm quartz tube, and evacuate them to 10 -3 After pa, melt and package the quartz tube with a flame, put it into a muffle furnace, and slowly raise it to 900°C, the heating rate is 30°C / hour, keep the temperature for 48 hours, take it out after cooling, at this time the sample is loose, take out the sample again Grind and mix well, then put it in a quartz tube and vacuumize it, and sinter it in...

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Abstract

The invention relates to a LiGaGe2Se6 compound, LiGaGe2Se6 nonlinear optical crystals, and a preparation method and an application thereof. The LiGaGe2Se6 compound is prepared through solid-phase reaction. The LiGaGe2Se6 nonlinear optical crystals are grown by using a high-temperature melt spontaneous crystallization method or a Bridgman-Stockbarger method. During the growth of the LiGaGe2Se6 nonlinear optical crystals, the crystals can easily grow bigger, and the crystals are transparent and are non-coated. The growth speed is high, the cost is low, and large-size crystals are easy to obtain. The obtained LiGaGe2Se6 nonlinear optical crystals has the advantages of relatively wide light transmittance band, relatively high hardness, good mechanical performance, resistances to fragmentation and deliquescence, easy processing, and easy storing. The LiGaGe2Se6 nonlinear optical crystals can be used for manufacturing nonlinear optical devices.

Description

technical field [0001] The present invention relates to a LiGaGe 2 Se 6 compound, LiGaGe 2 Se 6 nonlinear optical crystals (LiGaGe 2 Se 6 single crystal) and the LiGaGe 2 Se 6 Single crystal preparation method and the LiGaGe 2 Se 6 Use of single crystals for fabrication of 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 lase...

Claims

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Application Information

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IPC IPC(8): C01B19/00C30B29/46C30B11/00C30B33/02G02F1/355
Inventor 姚吉勇梅大江尹文龙傅佩珍吴以成
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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