Three-order nonlinear optical telluro-composite film and preparation method thereof

A third-order nonlinear, composite film technology, applied in nonlinear optics, optics, optical components, etc., can solve the problems of unstable film composition, difficult to control uniform thickness, affecting film quality, etc., and achieve simple, reliable, reliable and good process. Non-linear characteristics, the effect of uniform film thickness

Inactive Publication Date: 2010-09-22
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for TeO 2 -SiO 2 The transparent sol system adopts the tellurium-based film made by the pulling method, and the composition of the obtained film is unstable (such as reacting with water in the air), and the thickness is not easy to control uniformly, which ultimately affects the quality of the film; at the same time, only the pulling method cannot Change the composition of the sol after film formation according to the needs, and it is impossible to fundamentally change the properties of the film

Method used

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Examples

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Effect test

Embodiment 1

[0022] The third-order nonlinear optical tellurium-based composite thin film of the present invention is SiO 2 The particles are embedded with TeO 2 and / or Te formed Te / TeO 2 -SiO 2 Composite film structure.

[0023] The preparation method of the third-order nonlinear optical tellurium-based composite thin film of this embodiment includes the following steps:

[0024] a. Preparation of TeO 2 -SiO 2 Transparent composite sol;

[0025] d. TeO 2 -SiO 2 The transparent composite sol generates a composite film on the working electrode by electrolysis; the Te / TeO in the composite film is adjusted by controlling the potential, controlling the current method or adjusting the start and stop potential in the cyclic voltammetry method 2 The composition and morphology of and SiO 2 The ratio; by adjusting, can make TeO 2 The ratio of various values ​​​​is formed between Te and Te, and Te / TeO can also be adjusted 2 with SiO 2 The ratio between to achieve different purposes.

[...

Embodiment 2

[0030] The invention also discloses another method for preparing a third-order nonlinear optical tellurium-based composite thin film, which includes the following steps:

[0031] a. Preparation of TeO 2 -SiO 2 Transparent composite sol;

[0032] b. Dry the transparent composite sol until it becomes a gel, then grind it into powder, heat-treat the powder, raise the temperature from room temperature to 50°C for 30 minutes, and raise the temperature to 350-500°C by increasing the temperature by 50°C for 30 minutes. This implementation Adopt 500 ℃ in the example; Insulate 30-60min, in the present embodiment, insulate 30min, obtain Te / TeO 2 -SiO 2 The powder material is naturally cooled to room temperature; the powder Te / TeO is adjusted by controlling the heat treatment temperature 2 Composition, structure and its relationship with SiO 2 proportion;

[0033] c. use the powder obtained in step b to obtain a thin film material by vacuum coating; use Te / TeO 2 -SiO 2 The blank ...

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Abstract

The invention discloses a three-order nonlinear optical telluro composite film and a preparation method thereof. In the method, a Te / TeO2-SiO2 composite film structure formed by TeO2 and / or Te is embedded among SiO2 particles; the film is prepared by an electrochemically induced sol-gel method, the composite film structure has good nonlinear features, and three-order nonlinear optical polarizability Chi (3) reaches more than 10<-8>esu; the Te / TeO2-SiO2 composite film is prepared by an electrochemical method through TeO2-SiO2 transparent composite sol, TeO2 and / or Te is separated out of the soil by virtue of electrochemical induction to form a film with SiO2, thus achieving the purpose of forming the Te / TeO2-SiO2 composite film structure, and realizing simple process; and the Te / TeO2-SiO2 composite film is prepared by a vacuum coating method through TeO2-SiO2 transparent composite sol-gel; and by virtue of temperature control for heat treatment, composition and structure of gel powder is regulated and controlled, thus achieving the purpose of forming the Te / TeO2-SiO2 composite film structure, and having simple and reliable process as well as uniform thickness of film layers.

Description

technical field [0001] The invention relates to an optical thin film and a preparation method thereof, in particular to a third-order nonlinear optical tellurium-based composite thin film and a preparation method thereof. Background technique [0002] Nonlinear optical materials are materials whose optical properties depend on the intensity of incident light. As the material basis of modern optical communications, nonlinear optical materials are widely used in optical communications, optical computers, optical information processing, and optical switches. In the prior art, there are a wide variety of nonlinear optical materials, among which tellurium-based materials, such as TeO 2 and TeO 2 Solid materials such as base glass have received special attention due to their unique high nonlinear refractive index. Studies have shown that TeO 2 Glass is an ideal material for preparing devices such as optical switching devices, acousto-optic devices and optical amplifiers. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/22G02B1/10G02F1/355
Inventor 辜敏李强鲜晓东甘平
Owner CHONGQING UNIV
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