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Infrared non-linear optical crystals Ln4GaSbS9

A nonlinear optics and infrared technology, applied in crystal growth, self-solid, single crystal growth, etc., can solve problems such as no literature reports

Active Publication Date: 2011-09-21
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Infrared non-linear optical crystals Ln4GaSbS9
  • Infrared non-linear optical crystals Ln4GaSbS9
  • Infrared non-linear optical crystals Ln4GaSbS9

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Embodiment Construction

[0010] The simple substance Ln (Ln=Pr, Nd, Sm, Gd, Tb, Dy, Ho), Sb, Ga, S are weighed according to the stoichiometric ratio, placed in a small quartz crucible, transferred to a large quartz tube, and placed in a high vacuum Seal the tube. Put the sealed quartz tube in a programmed temperature-controlled tube furnace, heat it up to 950°C after 2100min, keep it at this temperature for 7200min, and then drop to 300°C after 7200min, then turn off the temperature controller and drop to room temperature. Yellow bulk crystals (X-ray single crystal test) and pure powder phases can be obtained.

[0011] Table 1Ln 4 GaSbS 9 Crystallographic data

[0012]

[0013]

[0014] a R 1 =∑||F o |-|F c || / ∑|F o |, wR 2 =[∑w(F o 2 -F c 2 ) 2 / ∑w(F o 2 ) 2 ] 1 / 2

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Abstract

The invention relates to infrared non-linear optical crystals Ln4GaSbS9, and belongs to the field of inorganic non-linear optical materials. The crystals are synthesized by an inorganic solid phase one-step synthesis method. The synthetic condition is that the reaction is performed for 5 days at the temperature of 950 DEG C. A molecular formula of the crystals is Ln4GaSbS9, wherein Ln is one of Pr, Nd, Sm, Gd, Tb, Dy and Ho; the crystals belong to an orthorhombic system; and the space group is Aba2. Sm4GaSbS9 has excellent nonlinear optical properties; and the powder second harmonic generation (SHG) coefficient of the Sm4GaSbS9 is 2 times that of potassium dihydrogen phosphate (KDP).

Description

Technical field [0001] The invention relates to a class of rare earth sulfide materials and a preparation method thereof, and belongs to the field of inorganic nonlinear optical materials. Background technique [0002] Nonlinear optics (NLO) crystals have nonlinear optical effects such as frequency doubling, sum frequency, difference frequency, and parametric amplification, and have important application values ​​in high-tech fields such as laser frequency conversion, electrical modulation, and photorefractive information processing. NLO crystals can be classified according to the wavelength range of their application: Among them, the NLO crystals in the ultraviolet and visible regions have BBO (β-BaB 2 O 4 ), LBO(LiB 3 O 5 ), KTP (KTiOPO 4 ), they have been widely used in practice with their excellent optical performance. Most NLO materials in the infrared region are ABC 2 Type chalcopyrite structure semiconductor material, this kind of material has large nonlinear optical coeff...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B1/10
Inventor 吴立明陈梅春吴新涛陈玲
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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