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Solid-state nonlinear body material and preparation method thereof

A nonlinear and third-order nonlinear technology, applied in the field of preparation of optical materials, can solve the problems of colloidal solutions such as easy evaporation, storage, and random placement, and achieve low cost, easy operation, and stable material properties.

Active Publication Date: 2013-05-22
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, although the nonlinear optical properties of metal nanoparticles and polymer composites have been widely reported, such research is mainly on thin film materials or colloidal solutions. Due to the small thickness of thin film materials, it still needs a lot of research in optical applications. The pump light intensity can only realize the function of response, which limits its application to some extent. The colloidal solution also limits its application to a certain extent due to factors such as its easy evaporation, storage, and random placement. Thick nonlinear optical materials, especially solid materials, due to the large optical path accumulation nonlinear effect, only need to use a small pump light to achieve more obvious optical changes, which reduces the application to a certain extent. The threshold of light intensity greatly improves the sensitivity of the device. And because it is a solid material, it is easy to store and place. Therefore, solid-state bulk materials with large third-order nonlinear effects have more practical application prospects and markets in device research. need

Method used

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  • Solid-state nonlinear body material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Measure 200ml of 1mM HAuCl 4 ·3H 2 O aqueous solution, add it to a 1L flat-bottomed flask connected with a condenser, stir and heat to boiling, quickly add 20ml of 38.3mM sodium citrate aqueous solution to the boiling HAuCl 4 In the solution, a reduction reaction was carried out, and the color of the solution changed from light yellow to wine red within 2 minutes, indicating that the noble metal gold nanoparticles had been reduced. After boiling for 10 minutes, remove the heat source and continue stirring for 15 to 20 minutes until the temperature of the solution drops to room temperature to obtain a colloidal solution containing gold nanoparticles with uniformly dispersed particles, uniform diameter, and a size of about 12 nm. The solution was centrifuged several times, diluted with deionized water, and unreacted and reacted salts were removed to obtain a 12 mg / ml colloidal solution containing gold nanoparticles. Take 10ml of this solution and place it in a clean wei...

Embodiment 2

[0033] A colloidal solution containing gold nanoparticles was prepared using the method of Example 1. Omit the steps to centrifuge the solution and remove the salts. Take 10ml of this solution and place it in a clean weighing bottle. In order to fully dissolve the polymer to be added below, add about 40ml of deionized water to dilute to 20% of the original. Weigh 11.88g of polyvinylpyrrolidone powder, slowly pour it into a colloid solution containing gold nanoparticles, and fully dissolve it in an ultrasonic bath to obtain a polymer solution of Au / PVP. Put the solution in an oven, set the temperature at 60 degrees, and bake for 7 days to obtain Au / PVP solid nonlinear material with a thickness of 0.5 cm and a third-order nonlinear optical coefficient of 5×10 -9 esu, where the mass of Au is 1% of the total mass of the material.

Embodiment 3

[0035] The method for preparing the colloidal solution containing gold nanoparticles in Example 1 was used. The prepared colloidal solution containing gold nanoparticles was centrifuged several times, diluted with absolute ethanol, and unreacted and reacted salts were removed to obtain an ethanol solution with a colloidal gold concentration of about 12 mg / ml. Take 10ml of this solution and place it in a clean weighing bottle, and place it in an ultrasonic pool to fully disperse the gold nanoparticles. Weigh 1.08g of polymethyl methacrylate (English name Polymethyl Methacrylate, PMMA for short) or its ethanol solution and slowly pour it into the colloidal solution containing gold nanoparticles, fully dissolve it in the ultrasonic pool, and obtain the Au / PMMA Polymer solutions containing noble metal nanoparticles. Put the mixed solution in a freeze dryer, remove the water in the solution, and obtain a solid Au / PMMA solid nonlinear material. The thickness of this material is 0.1...

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Abstract

The invention provides a solid-state nonlinear body material which is a polymer material containing noble metal nanometer granules, has the thickness of at least 1 mm, the preferential thickness of 1 cm to 80 cm, the more preferential thickness of 1 cm to 50 cm and the third-order nonlinear coefficient of 10<-6> to 10<-9> esu. The invention also provides a preparation method of the solid-state nonlinear body material. The optical material prepared by the method has stable performance and no toxin, is harmless and is applicable to the field of optical devices. The preparation process of the solid-state nonlinear body material is simple and easy to operate and has low cost.

Description

technical field [0001] The present invention relates to a solid nonlinear material and a preparation method of the material, in particular to an optical material with a large third-order nonlinear coefficient formed by combining a metal nanocluster and an organic polymer material and the optical material of the optical material Preparation. Background technique [0002] Media with nonlinear optical effects are called nonlinear optical materials, which differ from other materials in that electrons and charges in these materials are either particularly easily polarized or displaced under the influence of traveling waves of energy, exhibits a strong nonlinear effect. Nonlinear optical materials can be divided into second-order, third-order and high-order nonlinear optical materials according to their nonlinear effects, and dielectric materials that can produce large third-order nonlinear optical effects are called third-order nonlinear optical materials. . [0003] Optical m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/361C08J5/00
Inventor 宁廷银周岳亮陆珩陈聪沈鸿张东香金奎娟杨国桢
Owner INST OF PHYSICS - CHINESE ACAD OF SCI