Application of Te/TeO2-SiO2 composite film as optical limiting material

Abstract

The invention relates to new application of a Te / TeO2-SiO2 composite film, namely, the application of the Te / TeO2-SiO2 composite film as an optical limiting material. The Te / TeO2-SiO2 composite film is a composite film in which TeO2 and / or Te is embedded among SiO2 particles and the Te / TeO2-SiO2 composite film is generated by carrying out constant-potential electrochemical induction on transparent TeO2-SiO2 composite sol under -0.1 to -1.5V. According to the invention, optical limiting experiments are carried out by selecting Te / TeO2-SiO2 composite film samples prepared under different voltages, the Te / TeO2-SiO2 composite film is proved to have a better optical limiting property, and the application value of the Te / TeO2-SiO2 composite film in optical limiting is revealed. Therefore, the Te / TeO2-SiO2 composite film can be applied as the optical limiting material and can be applied to an optical limiter.

Description

technical field [0001] The present invention relates to Te / TeO 2 -SiO 2 Use of composite thin films, especially involving Te / TeO 2 -SiO 2 Application of composite thin films as optical limiting materials. Background technique [0002] In the era when laser technology is very developed and laser weapons are becoming more and more mature, laser has been widely used in industrial processing, communication technology, military fields, etc. At the same time, laser has constituted a potential threat to military and civilian optical facilities and human eyes. Inevitable injury and damage to users and optical components. When people realized the seriousness of the problem, they began to study laser protection technology. Although scholars at home and abroad have developed various optical protection methods, relatively speaking, optical limiters have broad-spectrum resistance to variable wavelength lasers. It has many advantages such as easy processing, fast response time, can ...

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Problems solved by technology

However, there are still few domestic and foreign reports on the optical limiting effect of tellurium-based materials. Indian scholar C.S. Suchand Sandeep et al. conducted research on the optical limiting properties of Te and Ag2Te nanowires, and found that Ag The limiting effect of 2Te nanowires is significantly higher than that of Te nanowires; domestic scholar Li Yuqiong et al. The optical limiting properties of 2:Er2O3 materials were studied, and Er3 doped +Glass material, using a 532nm picosecond laser to measure the change of the output power under different incident powers, it is found that the output power and the incident power are approximately linear when the incident power is low, but when the incident power reaches the threshold of 1.2mW , the output power no longer increases with the increase of the incident power, and the output power tends to a threshold range

[0005] From the above-mentioned domestic and foreign research progress and literature reports, although there have been individual reports on the optical limiting characteristics of tellurium-based materials, the research on tellurium-based composite thin films There are few research reports on the optical limiting characteristics of

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