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DAST-based adjustable metamaterial, preparation method and application thereof

A metamaterial and adjustable technology, applied in the field of metamaterials, can solve problems such as the inability to realize the adjustable function of metamaterials, and achieve the effect of realizing adjustable functions, reducing absorption loss, and wide adjustment range

Pending Publication Date: 2020-05-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, dielectric metamaterials based on silicon or titanium dioxide are all single-frequency point responses, which cannot realize the adjustable function of metamaterials (see Y.L.Huang, H.X.Xu, Y.X.Lu, Journal of Physical Chemistry C, 2018, 122, 2990 literature)

Method used

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  • DAST-based adjustable metamaterial, preparation method and application thereof
  • DAST-based adjustable metamaterial, preparation method and application thereof
  • DAST-based adjustable metamaterial, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0037] A DAST-based tunable metamaterial such as figure 1 As shown, the DAST-based adjustable metamaterial consists of a base layer 1, a lower conductive layer 2, a DAST cylindrical organic resonator array layer 3, a dielectric layer 4 complementary to the DAST cylindrical organic resonator array layer 3, and an upper conductive layer. Layer 5 composition. The base layer 1 is a quartz sheet, the upper conductive layer 5 and the lower conductive layer 2 are both ITO transparent conductive films, and the DAST cylindrical organic array layer 3 is sandwiched between the ITO thin film layers of the upper and lower conductive layers, such as figure 2 shown. Among them, the organic DAST cylindrical array layer 3 itself has low loss in the visible light band, and at the same time, by designing the structural size of the metamaterial, its impedance does not match the impedance of free space at all, so as to achieve high reflectivity of incident light. On the other hand, by applying ...

Embodiment 2

[0041] A method for preparing an adjustable metamaterial based on DAST, comprising the following specific steps:

[0042] (1) Select a quartz sheet with a certain thickness and refractive index as the base layer 1, clean the quartz glass sheet, and dry it;

[0043] In this step, the cleaning process is as follows: first clean the surface of the quartz glass sheet with a dust-free cloth and detergent, and then rinse it with deionized water for 15 minutes; put it in acetone solution for ultrasonic cleaning for 15 minutes; Ultrasonic cleaning in water and ethanol for 15 minutes; take out the quartz glass piece, rinse it with deionized water for 15 minutes until it is cleaned, and finally dry the quartz glass piece with nitrogen;

[0044] Alternatively, choose a flexible PET plate as the substrate layer, clean the PET plate, and dry it;

[0045] (2) adopt magnetron sputtering method, on the upper surface of the quartz glass plate (or PET plate) that has been processed, deposit on...

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Abstract

The invention discloses a DAST-based adjustable metamaterial, a preparation method and an application thereof. The adjustable metamaterial comprises a lower conductive layer, a resonator array layer,a dielectric layer complementary with the resonator array layer and an upper conductive layer, wherein the resonator array layer is made of a DAST organic single crystal or a DAST organic thin film. By changing the size of the array structure, high reflection of visible light and infrared light is realized; moreover, the reflection spectrum response characteristic of the metamaterial can be adjusted through the voltage; when the applied voltage is a negative value, the response wavelength is subjected to blue shift; and when the applied voltage is a positive value, the response wavelength is subjected to red shift. Whether positive voltage or negative voltage is applied, the moving range of the reflection spectrum is enlarged along with the increase of the absolute value of the voltage.

Description

technical field [0001] The invention relates to the field of metamaterials, in particular to a DAST-based adjustable metamaterial, a preparation method and an application thereof. Background technique [0002] Metamaterial is a kind of artificial composite structural material with extraordinary physical properties that natural materials do not have. It changes the permittivity and magnetic permeability of each point in space through artificial microstructures arranged periodically, so that the metamaterial in the Within a certain frequency range, it has negative permittivity and negative magnetic permeability that ordinary materials do not have. Metamaterials can break through the limitations of conventional materials and form a series of novel physical properties, such as negative refractive index, secondary convergence, reverse Doppler effect, etc., which make metamaterials have great potential in wave absorbers, perfect lenses, stealth, etc. (see Zheludev, N.I.Science, 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00
CPCG02B1/002
Inventor 许向东胡露谷雨成晓梦蒋亚东张敏刚景阳阳温歆冯元婷刘晋荣
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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