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Li6Cd5Sn4Se16 nonlinear optical crystal, and preparation method and application thereof

A nonlinear optics, crystal technology, applied in nonlinear optics, optics, crystal growth and other directions, can solve the problems of difficult crystal growth, affecting practical use, slow development of nonlinear crystals, etc.

Inactive Publication Date: 2016-04-20
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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  • Li6Cd5Sn4Se16 nonlinear optical crystal, and preparation method and application thereof
  • Li6Cd5Sn4Se16 nonlinear optical crystal, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1, using the high temperature melt spontaneous crystallization method to prepare Li 6 Cd 5 sn 4 Se 16 Crystal:

[0043] Weigh 2.785 g Li 2 Se, 9.568 g CdSe and 11.065 g SnSe 2 (i.e. Li 2 Se:CdSe:SnSe 2 =0.03mol:0.05mol:0.04mol), after mixing evenly, put it into a quartz glass tube of Φ12mm×20mm, and evacuate to 10 -3 After that, it was packaged with an oxyhydrogen flame and placed in a tube-type growth furnace, raised to 900°C, kept at a constant temperature for 72 hours, slowly cooled to room temperature at a rate of 5°C / h, and the tube-type growth furnace was closed; open, the transparent Li 6 Cd 5 sn 4 Se 16 crystals.

Embodiment 2

[0044] Embodiment 2, adopt crucible drop method to prepare Li 6 Cd 5 sn 4 Se 16 Crystal:

[0045] Weigh 0.417 grams of Li, 5.621 grams of Cd, 4.748 grams of Sn and 12.634 grams of Se (Li:Cd:Sn:Se=0.06mol:0.05mol:0.04mol:0.16mol), after uniform mixing, put it into a Φ20mm×30mm quartz In a glass tube, evacuate to 10 -3 After that, it is packaged with an oxyhydrogen flame and placed in a crystal growth furnace, raised to 900°C to melt the raw material. After the raw material is completely melted, the growth device drops vertically at a speed of 0.1-10mm / hour; after the crystal growth is completed, the growth device After cooling down to room temperature for 20 hours, a transparent Li 6 Cd 5 sn 4 Se 16 crystals.

[0046] After testing, the Li prepared by the above-mentioned examples 1-2 6 Cd 5 sn 4 Se 16 Nonlinear optical crystals belong to the orthorhombic crystal system, and the space group is Pna2 1 , whose unit cell parameters are: α=β=γ=90°, Z=7, Density: 5....

Embodiment 3

[0048] The Li of embodiment 1-2 gained 6 Cd 5 sn 4 Se 16 The crystal is not easy to break, easy to cut, polish and store, and does not deliquesce; the Li obtained in Example 1-2 6 Cd 5 sn 4 Se 16 crystal, placed in the attached figure 1 At the position of the device labeled 3, at room temperature, a Q-switched Ho:Tm:Cr:YAG laser is used as the light source, the incident wavelength is 2090nm infrared light, and the output wavelength is frequency-doubled light of 1045nm. The laser intensity is the same as AgGaSe 2 quite.

[0049] attached figure 1 is the use of the present invention Li 6 Cd 5 sn 4 Se 16 The working principle diagram of a typical nonlinear optical device made of nonlinear optical crystal, where 1 is the laser, 2 is the incident laser beam, and 3 is the Li after crystal post-processing and optical processing 6 Cd 5 sn 4 Se 16 Nonlinear optical crystal, 4 is the outgoing laser beam generated, 5 is a filter; the incident laser beam 2 is emitted by t...

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Abstract

The invention relates to a Li6Cd5Sn4Se16 nonlinear optical crystal, and a preparation method and application thereof. The Li6Cd5Sn4Se16 nonlinear optical crystal does not have the center of symmetry, and belongs to an orthorhombic system of which the space group is Pna21; and the cell parameters are as follows: a=14.400A, b=8.3990A, c=6.7870A, and alpha=beta=gamma=90 degrees. The nonlinear optical crystal is grown by a high-temperature melt spontaneous crystallization process or crucible descent process. In the nonlinear optical crystal growth process, the crystal can easily grow up, is transparent without coating, has the advantages of higher growth rate, low cost and the like, and can easily obtain larger size. The nonlinear optical crystal has the advantages of wider transparent wave range, higher hardness, favorable mechanical properties, low tendency to cracking and deliquescence and the like, and is easy for processing and storage. The Li6Cd5Sn4Se16 nonlinear optical crystal can be used for manufacturing nonlinear optical devices.

Description

technical field [0001] The invention belongs to the field of nonlinear optical crystals, preparation and application, in particular to a Li 6 Cd 5 sn 4 Se 16 nonlinear optical crystals (Li 6 Cd 5 sn 4 Se 16 single crystal) and the SnGa 4 Se 7 The preparation method of single crystal and the Li 6 Cd 5 sn 4 Se 16 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 co...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B11/00G02F1/355
CPCC30B11/00C30B29/46G02F1/3551
Inventor 姚吉勇李小双李超周墨林吴以成陈创天
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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