A kind of inorganic infrared nonlinear optical crystal material and preparation method thereof

Abstract

The invention discloses an inorganic infrared non-linear optical crystal material. In the inorganic infrared non-linear optical crystal material, the molecular formula is Hg2BrI3; the crystal space group is Cmc21; a is equal to 4.698 (1) angstroms; b is equal to 7.2246 (6) angstroms; c is equal to 13.520 (1) angstroms; alpha, beta and gamma are the same and equal to 90 o; and Z is 4. The inorganic infrared non-linear optical crystal material has high second-order non-linear optical coefficients capable of performing phase matching, big light-transmitting windows in ultraviolet, visible light and infrared regions and high thermal stability. A synthetic method of the inorganic infrared non-linear optical crystal material comprises the following steps of: adding HgBr2 and HgI2 in a molar ratio of 2:1 into acetone to dissolve; stirring at the temperature of between 30 and 50 DEG C for 8 hours; and after the reaction is finished, placing at room temperature to naturally volatilize the solvent to obtain a yellow transparent crystal. The crystal material can be widely applied in the fields of optics and the like.

Description

technical field

[0001] The invention relates to an inorganic infrared nonlinear optical crystal material, which belongs to the field of inorganic chemistry, and also belongs to the field of material science and optics. Background technique

[0002] Using the second-order nonlinear optical effect of crystals with non-centrosymmetric structure, nonlinear optical devices such as second harmonic generators, frequency converters, and optical parametric oscillators can be made. In many fields, such as laser technology, information technology and It has important application value in national defense and military affairs. Inorganic nonlinear optical materials play a dominant role in the practical research of second-order nonlinear optical materials. According to the light transmission band and scope of application, inorganic nonlinear optical crystal materials can be divided into ultraviolet region nonlinear optical crystal materials, visible light region nonlinear optical crystal...

Examples

Embodiment 1

[0025] Example 1: Hg 2 BrI 3 Preparation, characterization, transmittance range and thermal stability of

[0026] 0.7208 g (2 mmol) HgBr 2 and 0.4544 g (1 mmol) HgI 2 Add it to 15-20 ml of acetone solution, stir at 30-50 degrees Celsius until it becomes a clear and transparent solution, and continue to react for 8 hours. After the reaction is completed, cool it naturally, and obtain a yellow and transparent solution by natural volatilization at room temperature. The crystal is the desired crystal material. The crystal structure of the obtained compound was characterized by single crystal X-ray diffraction. The crystal is orthorhombic, space group Cmc 21 (No.36), the unit cell parameter is a = 4.698(1) ?, b = 7.2246(6)?, c = 13.520(1) ?, α = β = gamma = 90 o . The unit cell diagram of the compound is figure 1 As shown, the unit cell packing diagram of the compound on the bc plane is as follows figure 2 shown. Hg 2 BrI 3 The structure is simple, which is...

Embodiment 2

[0027] Example 2: Hg 2 BrI 3 powder frequency doubling effect

[0028] The frequency doubling performance of the prepared material is obtained by the Kurtz-Perry powder frequency doubling test method. The specific operation steps are as follows:

[0029]Grind the obtained second-order nonlinear optical crystal material into a powder with a particle size of about 80-100 microns, and then install it in a sample cell with glass windows on both sides, then place the sample cell on the laser optical path, and use Nd:YAG pulse A laser is used as a light source to generate fundamental frequency light with a wavelength of 1064 nanometers, which is injected into the sample cell. KTP single crystal powder with a particle size of about 80-100 microns is used as a standard sample, and the signal is displayed on the oscilloscope through a photomultiplier tube. Test results show that its powder frequency doubling effect is 1.2 times that of KTP (potassium titanyl phosphate).

Embodiment 3

[0030] Example 3: Hg 2 BrI 3 Frequency doubling effect phase matching test

[0031] The obtained second-order nonlinear optical crystal materials were ground and sieved into powders with different particle size ranges (20-40, 40-60, 60-80, 80-100, 100-125, 125-150 and 150-200 Micron), and then installed in the sample cell with glass windows on both sides, then put the sample cell on the laser optical path, use Nd:YAG pulsed laser as the light source to generate fundamental frequency light with a wavelength of 1064 nanometers into the sample cell, and the signal is photoelectrically multiplied The tube is displayed on the oscilloscope, and the intensity of frequency-multiplied signals of different particle sizes is tested. After drawing, analyze and judge whether the compound can be phase-matched. For the test results of powder frequency doubling phase matching, see Figure 7 , it can be seen that the materials can be phase matched.

technical field

[0001] The invention relates to an inorganic infrared nonlinear optical crystal material, which belongs to the field of inorganic chemistry, and also belongs to the field of material science and optics. Background technique

[0002] Using the second-order nonlinear optical effect of crystals with non-centrosymmetric structure, nonlinear optical devices such as second harmonic generators, frequency converters, and optical parametric oscillators can be made. In many fields, such as laser technology, information technology and It has important application value in national defense and military affairs. Inorganic nonlinear optical materials play a dominant role in the practical research of second-order nonlinear optical materials. According to the light transmission band and scope of application, inorganic nonlinear optical crystal materials can be divided into ultraviolet region nonlinear optical crystal materials, visible light region nonlinear optical crystal...

Examples

Embodiment 1

[0025] Example 1: Hg 2 BrI 3 Preparation, characterization, transmittance range and thermal stability of

[0026] 0.7208 g (2 mmol) HgBr 2 and 0.4544 g (1 mmol) HgI 2 Add it to 15-20 ml of acetone solution, stir at 30-50 degrees Celsius until it becomes a clear and transparent solution, and continue to react for 8 hours. After the reaction is completed, cool it naturally, and obtain a yellow and transparent solution by natural volatilization at room temperature. The crystal is the desired crystal material. The crystal structure of the obtained compound was characterized by single crystal X-ray diffraction. The crystal is orthorhombic, space group Cmc 21 (No.36), the unit cell parameter is a = 4.698(1) ?, b = 7.2246(6)?, c = 13.520(1) ?, α = β = gamma = 90 o . The unit cell diagram of the compound is figure 1 As shown, the unit cell packing diagram of the compound on the bc plane is as follows figure 2 shown. Hg 2 BrI 3 The structure is simple, which is...

Embodiment 2

[0027] Example 2: Hg 2 BrI 3 powder frequency doubling effect

[0028] The frequency doubling performance of the prepared material is obtained by the Kurtz-Perry powder frequency doubling test method. The specific operation steps are as follows:

[0029]Grind the obtained second-order nonlinear optical crystal material into a powder with a particle size of about 80-100 microns, and then install it in a sample cell with glass windows on both sides, then place the sample cell on the laser optical path, and use Nd:YAG pulse A laser is used as a light source to generate fundamental frequency light with a wavelength of 1064 nanometers, which is injected into the sample cell. KTP single crystal powder with a particle size of about 80-100 microns is used as a standard sample, and the signal is displayed on the oscilloscope through a photomultiplier tube. Test results show that its powder frequency doubling effect is 1.2 times that of KTP (potassium titanyl phosphate).

Embodiment 3

[0030] Example 3: Hg 2 BrI 3 Frequency doubling effect phase matching test

[0031] The obtained second-order nonlinear optical crystal materials were ground and sieved into powders with different particle size ranges (20-40, 40-60, 60-80, 80-100, 100-125, 125-150 and 150-200 Micron), and then installed in the sample cell with glass windows on both sides, then put the sample cell on the laser optical path, use Nd:YAG pulsed laser as the light source to generate fundamental frequency light with a wavelength of 1064 nanometers into the sample cell, and the signal is photoelectrically multiplied The tube is displayed on the oscilloscope, and the intensity of frequency-multiplied signals of different particle sizes is tested. After drawing, analyze and judge whether the compound can be phase-matched. For the test results of powder frequency doubling phase matching, see Figure 7 , it can be seen that the materials can be phase matched.

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