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Planar micro-nano structure for realizing circular dichroism

A technology of micro-nano structure and circular dichroism, applied in the field of micro-nano optics, can solve problems such as the difficulty of three-dimensional metal micro-nano structure

Inactive Publication Date: 2019-12-03
中山科立特光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is very difficult to prepare three-dimensional metal micro-nano structures by these techniques, so it is very important to design planar metal micro-nano structures with circular dichroic signals, and dynamically adjustable micro-nano structures are very important for reducing the number of fabricated structures and saving resources. of

Method used

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  • Planar micro-nano structure for realizing circular dichroism
  • Planar micro-nano structure for realizing circular dichroism
  • Planar micro-nano structure for realizing circular dichroism

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, a micro-nano structure to achieve circular dichroism includes a base layer, an L-shaped metal frame 1 and a metal plate 2; the L-shaped metal frame 1 structure is placed on the upper part of the metal plate 2 and connected to it, forming a hand sex slot 3.

[0029] The embodiments of the present application provide a planar micro-nano structure that realizes circular dichroism, which can generate a transmitted circular dichroic signal, and the maximum value can reach 10%.

[0030] Specifically: the lengths of the two arms of the L-shaped frame are equal; the widths of the two arms of the L-shaped frame are not equal. The width of each part of the chiral groove 3 is equal and less than 1 / 3 of the arm width of the L-shaped frame. Both the L-shaped metal frame 1 and the metal plate 2 are made of precious metal materials, such as gold, silver, etc. Specifically, the silver material is selected in this embodiment. The chiral groove 3 is formed b...

Embodiment 2

[0036] In order to further illustrate the circular dichroism characteristic of a kind of planar micro-nano structure that realizes circular dichroism in embodiment 1, such as Figure 2-Figure 5 As shown, this embodiment discloses its transmission spectrum and circular dichroism spectrum under left-handed and right-handed circularly polarized light irradiation.

[0037] Such as figure 1 As shown, the present embodiment sets the thickness t of the L-shaped metal frame 1 1 =80nm, the arm length l of the metal frame 1 =600nm, the arm width of one end of the metal frame is w 1 =300nm, the other end arm width w 2 =200nm, the line width of the metal frame d=20nm; the thickness t of the metal plate 2 2 = 10 nm.

[0038] Such as figure 2 It is a transmission spectrum diagram and a circular dichroism spectrum diagram of a planar micro-nano structure that realizes circular dichroism in this embodiment, from figure 2 We can see that the resonant mode at wavelength 770nm and 810nm...

Embodiment 3

[0041] A planar micro-nano structure for realizing circular dichroism in this embodiment is basically the same as Embodiments 1 and 2, the only difference is that the metal plate 2 is only added under one arm of the L-shaped metal frame 1 . Such as Figure 4 and 5 As shown, adding the metal plate 2 only under one arm of the L-shaped metal frame 1 can generate a CD signal, and the maximum value of the CD signal reaches 12%. This is a 4% increase over the signal in Example 1. Therefore, during ion beam etching, even if the ion beam is unstable, the generation of CD signals will not be affected if a certain part of the metal plate 2 is pierced, and the preparation has relatively low requirements on the process.

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Abstract

The invention relates to the technical field of micro-nano optics, in particular to a planar micro-nano structure for realizing circular dichroism. The planar micro-nano structure comprises an L-shaped frame structure and a metal plate structure. The L-shaped metal frame structure is arranged at the upper part of a metal plate and is connected with the metal plate; and magnetic fluid is arranged in a metal groove formed by the metal plate and a metal frame. According to the planar micro-nano structure, a transmitted circular dichroism signal can be generated; the maximum value can reach 10%; and the independent L-shaped frame structure does not have the circular dichroism signal. And the magnetic fluid is arranged in the L-shaped gold groove and the magnetic fluid changes the refractive index by changing the intensity of the magnetic field under the magnetic field, so that the circular dichroism signal of the magnetic fluid can be dynamically regulated and controlled.

Description

technical field [0001] The invention relates to the field of micro-nano optics technology, in particular to a planar micro-nano structure for realizing circular dichroism. Background technique [0002] Chiral refers to the property that the structure cannot coincide with its mirror image, and the chiral structure and its mirror image are called chiral enantiomers. Chirality arises from parity violation in weak interactions, which play an important role in life processes. For example, DNA molecule is the main genetic material in the human body, and the double helix structure of DNA molecule discovered by Crick and Watson in the middle of the 20th century has chirality. In addition, the most important amino acids in the human body (except glycine) are chiral, and all exist as left-handed. One direction of chiral research is the interaction between chiral structures and electromagnetic waves. The research in this direction not only produced many novel physical phenomena, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/00G02F1/01
CPCG02F1/0081G02F1/0102
Inventor 不公告发明人
Owner 中山科立特光电科技有限公司
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