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Second-order nonlinear optical crystal material and preparation and application thereof

A second-order nonlinear, optical crystal technology, used in the growth of polycrystalline materials, crystal growth, single crystal growth, etc., can solve the problems of difficult preparation of compound pure phase, increase of nonlinear optical coefficient, etc., and achieve large-scale industrial production. , the method is simple, the effect of mild conditions

Active Publication Date: 2017-09-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most of the preparation methods of these materials are high-temperature solid-phase synthesis, and the pure phase of the compound is difficult to prepare, and the nonlinear optical coefficient needs to be further improved

Method used

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  • Second-order nonlinear optical crystal material and preparation and application thereof
  • Second-order nonlinear optical crystal material and preparation and application thereof
  • Second-order nonlinear optical crystal material and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Preparation of 1#~9# samples

[0033] The strontium source, sodium source, boron source, mineralizer and water are evenly mixed according to a certain ratio to obtain the initial gel mixture, and the initial gel mixture is sealed in a 25mL polytetrafluoroethylene-lined hydrothermal reaction kettle, and placed in a box In a type resistance furnace, after crystallization at the crystallization temperature for a period of time, after filtering, washing and drying, a colorless needle-shaped NaSr 3 (OH)(B 9 o 16 )[B(OH) 4 ] crystal samples. Table 1 shows the relationship between the types and ratios of raw materials in the initial gel mixture, crystallization temperature, crystallization time, and sample numbers.

[0034] Table 1. Relationship between sample synthesis conditions and sample numbers

[0035]

[0036] (2) Crystal structure analysis of samples

[0037]The structures of samples 1# to 9# were analyzed by single crystal X-ray diffraction and powder X-r...

Embodiment 2

[0053] Adopt the preparation method similar to embodiment 1, difference is:

[0054] (1) The sodium source used is sodium chloride, the strontium source used is strontium nitrate, the boron source used is boric acid, and the mineralized substance used is hydrofluoric acid, wherein the sodium element, strontium element, The mol ratio of boron element, mineralizer and water is Na:Sr:B: mineralizer: water=2:0.5:40:5:200;

[0055] (2) The adopted crystallization temperature is 180° C., and the crystallization time is 24 hours.

[0056] After testing, the prepared compound NaSr 3 (OH)(B 9 o 16 )[B(OH) 4 ] crystal has a great frequency doubling effect, respectively KH 2 PO 4 (KDP) crystal 3.2 times, BBO (β-BaB 2 o 4 ) crystal 0.45 times.

Embodiment 3

[0058] Adopt the preparation method similar to embodiment 1, difference is:

[0059] (1) The sodium source used is a mixture of sodium carbonate and sodium nitrate, the strontium source used is a mixture of strontium carbonate and strontium chloride, the boron source used is boric anhydride, and the mineralized substance used is NaF, wherein the initial gel The mol ratio of sodium element, strontium element, boron element, mineralizer and water in the mixture is Na:Sr:B: mineralizer: water=40:10:4:0.1:1000;

[0060] (2) The adopted crystallization temperature is 240° C., and the crystallization time is 240 hours.

[0061] After testing, the prepared compound NaSr 3 (OH)(B 9 o 16 )[B(OH) 4 ] crystal has a great frequency doubling effect, respectively KH 2 PO 4 (KDP) crystal 3.2 times, BBO (β-BaB 2 o 4 ) crystal 0.45 times.

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Abstract

The invention relates to a novel crystal material and a preparation method and application thereof. The chemical formula of the crystal material is NaSr3(OH)(B9O16)[B(OH)4], the crystal material belongs to a trigonal crystal system, space group is P31c, and crystal unit cell parameters include that a is equal to 9.9-10.0 , b is equal to 9.9-10.0 , c is equal to 8.7-8.8 , alpha is equal to beta equal to 90 degrees, gamma is equal to 120 degrees, and Z is equal to 2. Compared with the prior art, the crystal material has great frequency doubling effect and is 3.20 times of KH2PO4(KDP) crystal and 0.45 time of BBO crystal. In addition, the crystal material has wide transmission range, ultraviolet transmission cutoff side of the crystal material is smaller than 190nm, and the crystal material has wide application prospect in the field of nonlinear optics, electro-optical modulation and photorefractive information processing.

Description

technical field [0001] The invention relates to the technical field of optical crystal materials, in particular to a second-order nonlinear optical crystal material and its preparation and application. Background technique [0002] The typical feature of the second-order nonlinear optical crystal is the frequency doubling effect (SHG), which is an important optoelectronic functional material and is widely used in frequency doubling devices, electro-optic modulation, and holographic storage elements. A large number of metal borates with non-central structure have excellent second-order nonlinear optical properties, which have attracted extensive interest of researchers at home and abroad. Nonlinear optical crystals that have been widely used in the market include LiB 3 o 5 (abbreviated as LBO), β-BaB 2 o 4 (abbreviated as BBO) and KBe which can achieve frequency doubling effect in the deep ultraviolet region 2 BO 3 f 2 (abbreviated as KBBF), etc., wherein the shortest ...

Claims

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Application Information

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IPC IPC(8): C30B29/10C30B7/14
CPCC30B7/14C30B29/10
Inventor 张弛吴超
Owner TONGJI UNIV
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