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Micro-nano optical structure

An optical structure, micro-nano technology, applied in the field of micro-nano optics, can solve the problem of weak circular dichroism signal, and achieve the effects of enhanced chirality, strong practicability, and easy detection.

Inactive Publication Date: 2019-09-06
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the circular dichroism signal of natural molecules is very weak at present. At this time, it is necessary to artificially design some artificial micro-nano structures and combine them with linkers to enhance their circular dichroism.

Method used

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Embodiment 1

[0032] In order to enhance the circular dichroism of natural molecules, the embodiment of the present application provides a micro-nano optical structure, such as figure 1 As shown, it includes a first metal strip 1, a second metal strip 2, a third metal strip 3 and a fourth metal strip 4, one end of the second metal strip 2 is vertically connected to one end of the first metal strip 1, and the third metal strip 3 The second metal strip 2 and the third metal strip 3 are located at the same side direction of the first metal strip 1 and vertically connected to the other end of the first metal strip 1 . One end of the fourth metal strip 4 is vertically connected to the other end of the third metal strip 3 , and the other end of the second metal strip 2 is vertically connected to the non-end position of the other end of the fourth metal strip 4 .

[0033] The embodiment of the present application provides a micro-nano optical structure with chirality, which can generate large circ...

Embodiment 2

[0037] In order to further illustrate the circular dichroism characteristic of a kind of micro-nano optical structure of embodiment 1, such as Figure 3-Figure 6 As shown, this embodiment discloses its absorption spectrum and circular dichroism spectrum.

[0038] Such as figure 1 As shown, the present embodiment sets the thickness of the micro-nano optical structure h=40nm; the length of the first metal strip 1 is l 1 = second metal strip 2 length l 2 = length l of the third metal strip 3 3 = length l of the fourth metal strip 4 4 =100nm; the first metal strip 1 width W 1 = second metal strip 2 width W 2 =The third metal strip 3 width W 3 = Fourth metal strip 4 width W 4 =20nm; the distance d between the second metal strip 2 and the third metal strip 3=10nm.

[0039] Such as figure 2 For the charge distribution diagram of this embodiment, from figure 2 We can see that when the left-handed polarized light (LCP) is irradiated, the positive charges are mainly concentr...

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Abstract

The invention relates to the technical field of micro-nano optics, in particular to a micro-nano optical structure. The structure comprises a first metal strip, a second metal strip, a third metal strip and a fourth metal strip; one end of the second metal strip is vertically connected with one end of the first metal strip; the third metal strip is vertically connected with a non-endpoint positionat the other end of the first metal strip; the second metal strip and the third metal strip are located on a same side of the first metal strip; one end of the fourth metal strip is vertically connected with the other end of the third metal strip; and the other end of the second metal strip is vertically connected with a non-endpoint position at the other end of the fourth metal strip. The micro-nano optical structure has chirality, is capable of generating relatively large circular dichroism, generating an excited electric field on the surface under the excitation of incident light, generating different absorptions for left polarized light and right polarized light, forming magnetic dipoles and electric dipoles and generating different phases so as to generate circular dichroism signals,and can be combined with natural molecules to enhance the chirality and facilitate the detection.

Description

technical field [0001] The invention relates to the technical field of micro-nano optics, in particular to a micro-nano optical structure. Background technique [0002] Circular dichroism (abbreviated as CD) is the most widely used method for determining protein secondary structure, and it is a fast, simple and accurate method for studying protein conformation in dilute solution. It can be measured in solution state, which is closer to its physiological state. Moreover, the determination method is quick and easy, and sensitive to conformational changes, so it is one of the main means to study the secondary structure of proteins, and has been widely used in the conformational studies of proteins. [0003] However, the circular dichroism signal of natural molecules is very weak at present. At this time, it is necessary to artificially design some artificial micro-nano structures and combine them with linkers to enhance their circular dichroism. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/19B81B7/02B82Y20/00B82Y40/00
CPCB81B7/02B82Y20/00B82Y40/00G01N21/01G01N21/19
Inventor 张梓彦张中月白瑜景志敏李颖
Owner SHAANXI NORMAL UNIV
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