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Single-layer micro-nano structure with adjustable asymmetric transmission signals and preparation method thereof

An asymmetric transmission and micro-nano structure technology, applied in the field of single-layer micro-nano structure and its preparation, can solve the problems of unadjustable and fixed modes, and achieve the effect of improving area and strength, obvious adjustment, and convenient adjustment

Active Publication Date: 2018-11-23
上海晶鼎光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the asymmetric transmission mode of the micro-nano structure is fixed and cannot be adjusted in the prior art, the embodiment of the present application provides a single-layer micro-nano structure with an adjustable asymmetric transmission signal and its preparation method. Embodiment The micro-nano structure includes a base layer, an absorption layer, a dielectric layer and a TCO thin film layer, the thickness of the absorption layer is greater than the sum of the thickness of the dielectric layer and the TCO thin film layer, and the second rectangular strip and the third rectangular strip are connected with the first electrode and the third rectangular strip respectively. The second electrode is used to connect the external circuit. By adjusting the voltage of the external circuit, the dielectric environment of the TCO film on the right side of the second rectangular strip is changed, so that the TCO film on both sides of the second rectangular strip has different refractive indices for the incident light, and an asymmetric Dielectric environment, generate AT signal, by adjusting the size and direction of the external circuit voltage so that the two sides of the second rectangular strip have the same or different refractive index, finally achieve the purpose of adjusting the AT signal

Method used

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  • Single-layer micro-nano structure with adjustable asymmetric transmission signals and preparation method thereof
  • Single-layer micro-nano structure with adjustable asymmetric transmission signals and preparation method thereof
  • Single-layer micro-nano structure with adjustable asymmetric transmission signals and preparation method thereof

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Embodiment 1

[0045] Such as figure 1 with figure 2 As shown, a single-layer micro-nano structure with adjustable asymmetric transmission signals includes a base layer 1 , an absorbing layer 2 , a dielectric layer 3 and a TCO thin film layer 4 .

[0046] Specifically: TCO is a transparent conductive oxide with excellent photoelectric properties, especially the band gap is generally greater than 3eV, the visible spectrum transmittance is as high as 80%, and the resistivity is as low as 10 -4 Ω cm, especially under the action of an external electric field, its refractive index will change. In this embodiment, TCO is preferably ITO. When the maximum refractive index of TCO is positively correlated with the strength of the applied electric field within a certain range, the refractive index of TCO at 10 -4 On the order of magnitude, it increases with the increase of the applied electric field.

[0047] The absorption layer 2 comprises a first rectangular strip 21, a second rectangular strip...

Embodiment 2

[0054] Such as image 3 As shown, based on the single-layer micro-nano structure disclosed in Embodiment 1, this embodiment discloses a single-layer micro-nano structure with adjustable asymmetric transmission signals. The fourth rectangular strip 24 and the fifth rectangular strip 24 of the micro-nano structure in this embodiment Bar 25 is respectively connected with the sixth rectangular bar 26 and the seventh rectangular bar 27 parallel to the second rectangular bar 22, the sixth rectangular bar 26 and the seventh rectangular bar 27 are identical, the sixth rectangular bar 26 and the seventh rectangular bar 27 are all made of precious metals.

[0055] Specifically: the sixth rectangular strip 26 and the seventh rectangular strip 27 are parallel to the first rectangular strip 21 and the third rectangular strip 23 respectively, shortening the distance between the second rectangular strip 22 and the first rectangular strip 21 and the third rectangular strip 23 The effective d...

Embodiment 3

[0057] Based on the single-layer micro-nano structure with adjustable asymmetric transmission signal disclosed in Embodiment 1, this embodiment discloses a single-layer micro-nano structure AT signal adjustment method with adjustable asymmetric transmission signal. The specific adjustment method is as follows :

[0058] Connect the external circuit power supply, a microcapacitor is formed between the second rectangular strip 22 and the third rectangular strip 23, the second rectangular strip 22 and the third rectangular strip 23 are two pole plates of the microcapacitor, by adjusting the external circuit The magnitude and direction of the voltage are adjusted to form the electric field between the two plates of the microcapacitor, and the carrier concentration inside the TCO film between the second rectangular strip 22 and the third rectangular strip 23 changes, resulting in a change in the right side of the second rectangular strip 22. The dielectric constant of the TCO thin ...

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Abstract

The invention belongs to the technical field of optical characteristic adjustment and control, and particularly relates to a single-layer micro-nano structure with adjustable asymmetric transmission signals and a preparation method thereof. The single-layer micro-nano structure with the adjustable asymmetric transmission signals comprises a base layer, an absorption layer, a dielectric layer and aTCO thin film layer; the two sides of a second rectangular strip are respectively provided with a fourth rectangular strip and a fifth rectangular strip which are symmetric with each other, the second rectangular strip and a third rectangular strip are respectively connected with a first electrode and a second electrode which are used for being connected with an external circuit to change an electric field, the electric field between the second rectangular strip and the third rectangular strip is changed, the dielectric environment of TCO thin film at the right side of the second rectangularstrip is changed, the two sides of the second rectangular strip have the same or different refractive indexes, and therefore the purpose of adjusting the AT signals is achieved. The single-layer micro-nano structure is simple and convenient to adjust and has high application and popularization value.

Description

technical field [0001] The invention belongs to the technical field of optical characteristic regulation, and in particular relates to a single-layer micro-nano structure with adjustable asymmetric transmission signals and a preparation method thereof. Background technique [0002] Asymmetric transmission (Asymmetric Transmission, AT) refers to the effect that electromagnetic waves with different polarization states show different transmission properties after entering the structure. Among them, transmission performance is mainly studied for transmission, absorption, reflection, etc. In the field of biomolecules, chiral molecules are generally weak, and artificial micro-nano metal structures can greatly improve their chirality. AT is particularly important as a detection signal for chiral molecules, so we are designing this asymmetric transmission structure When , it is necessary to achieve a strong asymmetric transmission effect, that is, a large AT value and as many AT sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/00
CPCG02F1/0018G02F1/0063
Inventor 赵文静
Owner 上海晶鼎光电科技有限公司
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