Electric control liquid crystal nonlinear optical device based on multi-layer composite structure and preparation method and application of electric control liquid crystal nonlinear optical device

A non-linear optics and multi-layer compounding technology, which is applied in the fields of nonlinear optics, optics, instruments, etc., can solve the problems of device doping particles easy to agglomerate, poor nonlinear optical performance, poor stability, etc., to achieve stable device performance, Significant nonlinear refractive properties, the effect of increasing nonlinear optical properties

Active Publication Date: 2022-08-09
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the device doped particles prepared by ordinary mixed doping are easy to agglomerate, have poor stability, and have poor nonlinear optical performance. The present invention is based on the idea of ​​improving the structure of the prepared device. Both the material and the liquid crystal have good nonlinear optical properties, and the liquid crystal has an electronically controlled tuning function, which provides the possibility of preparing an electronically controlled liquid crystal nonlinear optical device with a multilayer composite structure, and then provides an electronically controlled nonlinear optical device based on a multilayer composite structure. Liquid crystal nonlinear optical device and its preparation method and application

Method used

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  • Electric control liquid crystal nonlinear optical device based on multi-layer composite structure and preparation method and application of electric control liquid crystal nonlinear optical device
  • Electric control liquid crystal nonlinear optical device based on multi-layer composite structure and preparation method and application of electric control liquid crystal nonlinear optical device
  • Electric control liquid crystal nonlinear optical device based on multi-layer composite structure and preparation method and application of electric control liquid crystal nonlinear optical device

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preparation example Construction

[0037] It is preferred that the above-mentioned preparation method specifically comprises the following steps:

[0038] 1) Coating and modifying nanomaterials with surfactants to obtain functionalized nanomaterials with good dispersibility;

[0039] 2) Mix the functionalized nanomaterials with polyacrylic acid, stir in a magnetic stirrer at 1000rpm for 24 hours, use a glue homogenizer to make the mixed sample evenly spread on the ITO glass, and cure under ultraviolet light for 30min to form a nanomaterial layer;

[0040] 3) Two ITO glasses with nanomaterial layers are used to make a liquid crystal cell, and liquid crystal is poured into the liquid crystal cell to obtain the electrically controlled liquid crystal nonlinear optical device based on the multi-layer composite structure.

[0041] In the above preparation method, the mutual conversion between the self-focusing performance and the self-defocusing performance of nonlinear refraction can be realized by changing the conc...

Embodiment 1

[0045]1). Weigh 0.01 g of multi-walled carbon nanotubes (MWCNTs) and 0.002 g of cetyltrimethylammonium bromide (CTAB) into a beaker, add 10 mL of deionized water, and use a magnetic stirrer at 1000 rpm It was stirred for 10 hours and then sonicated at 40°C for 40 minutes. That is, functionalized multi-walled carbon nanotubes (CTAB / MWCNTs) after coating and modification are obtained.

[0046] 2). Weigh 0.03g of functionalized multi-walled carbon nanotubes and 1g of polyacrylic acid mixed into a small brown bottle, add a stirrer, stir at 1000rpm for 24 hours with a magnetic stirrer, and put the mixed sample in a homogenizer. It was evenly distributed on the ITO glass under UV light and cured for 30 min to form a multi-walled carbon nanotube thin film layer.

[0047] 3). Two pieces of ITO glass with a multi-walled carbon nanotube film layer are made into a liquid crystal cell, and the nematic liquid crystal BHR33400 (BHR33400 is the product number) is poured into the liquid crys...

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Abstract

The invention relates to an electric control liquid crystal nonlinear optical device based on a multi-layer composite structure and a preparation method and application of the electric control liquid crystal nonlinear optical device, and belongs to the field of composite nonlinear optical devices. The technical problems that in the prior art, doped particles of a device prepared through common mixed doping are prone to agglomeration, the stability is poor, and the nonlinear optical performance is poor are solved. The device sequentially comprises a first ITO glass substrate, a nanometer material layer attached to the first ITO glass substrate, a liquid crystal layer, a nanometer material layer attached to a second ITO glass substrate and a second ITO glass substrate. The nanometer material layer is made of nanometer materials with nonlinear optical performance, and the liquid crystal layer is made of liquid crystals with nonlinear electric control tuning characteristics. The device disclosed by the invention is prepared by compounding a nano material and liquid crystals in a layered form. The device prepared by the invention has good electrically-tunable nonlinear optical performance, and can be widely applied to research and development of laser protection materials and electrically-tunable laser protection devices.

Description

technical field [0001] The invention belongs to the field of composite nonlinear optical devices, in particular to an electronically controlled liquid crystal nonlinear optical device based on a multi-layer composite structure, and a preparation method and application thereof. Background technique [0002] With the development of lasers, laser protection technology has attracted more and more attention of researchers. Traditional laser protection devices are generally made of linear optics, which have the disadvantages of low visible light transmittance, narrow protection band, and low protection laser energy. Compared with traditional linear laser protection materials, the absorption or refraction coefficient of laser protection materials based on the principle of nonlinear optics can be nonlinearly "intelligently" tuned with the light intensity, and at the same time, the response speed is fast, which can effectively reduce the laser intensity and protect optical equipment a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/137G02F1/1333G02F1/355
CPCG02F1/137G02F1/1333G02F1/355
Inventor 宋静温学伟刘天昊范佳瑶弓凯
Owner CHANGCHUN UNIV OF SCI & TECH
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