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Photon crystal formboard preparing method under dynamic physical limiting conditions

A limited condition, photonic crystal technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve problems such as difficulty, photonic crystal or photonic crystal template falling off, etc., achieve low cost, reduce defects, and high efficiency Effect

Inactive Publication Date: 2007-11-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing photonic crystal templates under the conditions of dynamic physical constraints, to overcome the disadvantages of not being easy to obtain large-area, dense and firm photonic crystals or photonic crystal templates that are easy to fall off from the substrate in the above-mentioned methods, and adopt dynamic physical In a limited way, a relatively simple method and device for growing a three-dimensional photonic crystal structure are provided

Method used

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  • Photon crystal formboard preparing method under dynamic physical limiting conditions

Examples

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Effect test

Embodiment 1

[0018] The PS microspheres are evenly dispersed in a mixture of deionized water and absolute ethanol with a volume ratio of 2:3 until a milky white uniformly diluted suspension is formed, and placed in a bottle for later use.

[0019] Cut the ITO glass into 10×30mm, soak it in NaOH saturated ethanol solution, and ultrasonically clean it with deionized water and cleaning solution, then rinse it with deionized water, and put it in deionized water for use. The conductive surfaces of the two pieces of ITO glass are facing each other, and 8um polyethylene films are placed on the left and right edges, then bonded with glue, fixed with clips, and the simple device is placed at 30°. The ITO glass used in the experiment has good wettability with the water-based suspension of PS microspheres. With the help of capillary force, the diluted suspension fills the entire gap of the ITO glass, forming a three-dimensional mixture of ITO glass / diluted suspension / ITO glass. layer structure. Star...

Embodiment 2

[0021] The procedure is similar to Example 1, except that the dispersion volume ratio of deionized water to absolute ethanol is 1:4. The substrate used is a polished silicon wafer, and the polished surfaces of the two polished silicon wafers face each other, and the simple device is placed at an angle of 45°. The circulation speed of the advection pump was 1.0 cm / min. After 40 hours, the advection pump gradually and slowly decreased to 0, and the rest of the operations were the same as in Example 1.

[0022] Figures 2 and 3 roughly represent the schematic diagrams of the cross-section and longitudinal section of the colloidal crystal between the two substrates, respectively. The photonic crystal grows relatively loosely in the central emulsion flow region, and grows densely and firmly on both sides of the substrate, and the obtained area is larger.

[0023] The morphology of the obtained photonic crystal was observed under a scanning electron microscope (ZEISS-SUPRA55, German...

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Abstract

A method for preparing photon crystal template in the condition of dynamic physics limit, and it belongs to the preparation area of colloid photon crystal template. The preparation steps are as follows. Evenly disperse microballoon emulsion into dissolvent, and cut the template. Adhere correspond two sides to two piece of templates, and incline the above templates between 0 degree and 90 degree angle to put into the grower. Mix the colloid microballoon emulsion and dissolvent. The flow rate of microballoon emulsion is between 0.1 cm / min to 2.0 cm / min, and the cycle time is between 18 and 40 hours. gradually slowly reduce to 0. Put the template into environmental chamber, and control its temperature between 40 Deg C and 80 Deg C and its humidity between 60% and 80%. Self assemble itself to high quality photon crystal. The method can prepare the bigger dimension firm compact opal colloid crystal template, and its arrangement height is orderly and its flaws are few. It has the characteristics of craft simple, cost low, efficiency high, and preparation template compact. It is not easy to fall off from baseplate, so it has stronger operability and repeatability.

Description

technical field [0001] The invention belongs to the technical field of preparation of colloidal photonic crystal templates, and in particular relates to a preparation method of photonic crystal templates under dynamic physical constraints, specifically a self-assembly of colloidal microspheres at a certain flow rate under physical constraints And a method for preparing two-dimensional and three-dimensional photonic crystals. Background technique [0002] Photonic Band-Gap (PBG) materials, also known as Photonic Crystals, refer to materials with periodic changes in dielectric constant (refractive index), and are currently a frontier topic in the research of information functional materials. Photonic crystals have a unique function of adjusting the state of light propagation, and have very broad prospects in the fields of optoelectronic integration, photon integration, and optical communication. The application of photonic crystals in optics requires that their period constan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B5/00
Inventor 高建勋董洪荣孔祥华蔡敏敏石琳
Owner UNIV OF SCI & TECH BEIJING
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