A micro-nano structure that can generate circular dichroism

A technology of micro-nano structure and circular dichroism, applied in the field of micro-nano optics, can solve the problems of weak circular dichroism and high requirements for detection instruments, and achieve the effect of strong circular dichroism

Active Publication Date: 2021-04-06
义乌市牛尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the circular dichroism of natural molecules is generally very weak, which requires high detection equipment. At this time, it is necessary to artificially manufacture some micro-nano metal structures to enhance the circular dichroism of natural molecules to reduce the difficulty of experimental detection. Therefore, a Micro-nano structures that can produce circular dichroism are necessary

Method used

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  • A micro-nano structure that can generate circular dichroism
  • A micro-nano structure that can generate circular dichroism
  • A micro-nano structure that can generate circular dichroism

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Embodiment 1

[0029] This embodiment discloses a micro-nano structure that can produce circular dichroism. The micro-nano structure is composed of multiple unit structures connected to each other in a rectangular periodic array, such as figure 1 Each unit structure includes a rectangular hollow metal ring 1 and a metal strip 2, one end of the metal strip 2 is connected to the rectangular corner of the hollow metal ring 1 or the non-midpoint of the short side of the hollow metal ring, and the other end is connected to the hollow metal ring 1 The plane where the metal strip 2 and the hollow metal ring 1 are located has a characteristic angle α, and the characteristic angle α is not equal to 0°, 90° or 180°; the hollow metal ring 1 is a rectangular ring; the metal strip is a rectangular strip or " L"-shaped bar; both the metal bar 2 and the hollow metal ring 1 are made of precious metal materials.

[0030] in particular:

[0031] The inner ring of the hollow metal ring 1 can be in any shape, ...

Embodiment 2

[0042] Based on the micro-nano structure disclosed in Example 1, this embodiment further discloses a micro-nano structure that can produce circular dichroism. The difference from Example 1 is that, as Figure 5 As shown, there is a slit between the metal strip 2 and the rectangular hollow metal ring 1 .

[0043] Specifically: the metal strip 2 is connected to one side of the hollow metal ring 1 and separated from the other three sides. When left-handed polarized light irradiates the micro-nano structure of this embodiment, the slit between the metal strip 2 and the rectangular hollow metal ring 1 strengthens the flow current on the metal strip 2, and forms a Circulation, the coupling between the two makes the micro-nano structure of this embodiment absorb the left-handed polarized light greatly, thereby enhancing the circular dichroism of the micro-nano structure of this embodiment.

[0044] In this embodiment, the current distribution of the micro-nano structure is as follow...

Embodiment 3

[0047] Based on the micro-nano structure disclosed in the embodiment, this embodiment further discloses a micro-nano structure capable of producing circular dichroism. The difference from embodiment 1 is that there are no less than two metal strips 2 connected to the hollow metal The two opposite sides of ring 1, such as Figure 9 As shown, there are preferably two metal strips 2 in this embodiment, which are respectively arranged on two opposite sides of the rectangular ring.

[0048] The electric field distribution diagram of the micro-nano structure in this embodiment is as follows Figure 10 as shown, Figure 10 (a) is the current distribution diagram of the micro-nano structure irradiated by the left-handed light of the wavelength λ=820nm mode, Figure 10 (b) is the current distribution diagram of the micro-nano structure irradiated by the right-handed light of the wavelength λ=820nm mode, Figure 10 (c) is the current distribution diagram of the micro-nano structure i...

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Abstract

The present invention relates to the field of micro-nano optics, in particular to a micro-nano structure capable of producing circular dichroism. The micro-nano structure is composed of a plurality of unit structures connected to each other according to a rectangular periodic array, and each unit structure includes a rectangular hollow metal ring and a metal strip, one end of the metal strip is connected to the rectangular corner of the hollow metal ring or the non-midpoint of the short side of the hollow metal ring, and the plane where the metal strip and the hollow metal ring are located has a characteristic angle α. Under the excitation of the incident light, the connection between the metal strip and the hollow metal ring forms a circulation mode, and a fixed mode of magnetic dipoles and electric dipoles is formed on the hollow metal ring and the metal strip, so that when the left-handed polarized light is irradiated, a large The dissipation is small when the right-handed polarized light is irradiated, so that the electric field excited by the left-handed polarized light and the right-handed polarized light has a large difference, resulting in strong circular dichroism.

Description

technical field [0001] The invention relates to the technical field of micro-nano optics, in particular to a micro-nano structure capable of producing circular dichroism. Background technique [0002] Circular dichroism (CD) refers to the phenomenon of different degrees of absorption of right-handed polarized light (hereinafter referred to as RCP) and left-handed polarized light (hereinafter referred to as LCP). The relationship between them is called circular dichroism, which is a spectroscopic method for determining the asymmetric structure of molecules. It is mainly used to determine the three-dimensional structure of proteins. In the field of molecular biology, it is mainly used to determine the three-dimensional structure of proteins. It can also be used to determine nucleic acids and polysaccharides. three-dimensional structure. [0003] However, the circular dichroism of natural molecules is generally very weak, which requires high detection equipment. At this time, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30G02B5/00B82Y20/00G01N21/19
CPCB82Y20/00G01N21/19G02B5/003G02B5/3025
Inventor 刘凯王天堃吐达洪阿巴
Owner 义乌市牛尔科技有限公司
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