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Planar micro-nano structure capable of producing 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 of plane micro-nano structure

Active Publication Date: 2019-07-09
HANSHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to solve the technical problem of weak circular dichroism of planar micro-nano structure

Method used

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  • Planar micro-nano structure capable of producing circular dichroism
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  • Planar micro-nano structure capable of producing circular dichroism

Examples

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Embodiment 1

[0031] In order to solve the problem of weak circular dichroism of the planar micro-nano structure existing in the current technology, this embodiment provides a planar micro-nano structure capable of producing circular dichroism, including a unit structure, such as figure 1 As shown, the unit structure includes a rectangular bar 2 and a U-shaped structure 1, the rectangular bar 2 and the U-shaped structure 1 are located in the same plane, and the U-shaped structure 1 includes a first arm 11, a second arm 12 and a connecting bar 13. One arm 11 is parallel to the second arm 12, the first arm 11 and the second arm 12 are respectively connected to the two ends of the connecting bar 13, the rectangular bar 2 is located on one side of the U-shaped structure 1, parallel to the first arm 11, the rectangular bar 2 Both 2 and the U-shaped structure 1 are made of precious metal materials. The rectangular strip 2 is connected to the connecting strip 13, the rectangular strip 2 is in the ...

Embodiment 2

[0039] Based on the planar micro-nano structure capable of producing circular dichroism disclosed in Example 1, the heights of the first arm 11, the second arm 12 and the rectangular bar 2 are different, and other structures and physical parameters are the same. Such as Figure 5 As shown, the height of the rectangular bar 2 is equal to that of the first arm 11 , but the bottom of the rectangular bar 2 is lower than the level of the connecting bar 13 . Its charge distribution diagram, absorption spectrum diagram and circular dichroism spectrum diagram are as follows: Figure 6-8 shown.

[0040] In the wavelength band of λ=740nm, under the left-handed polarized light irradiation of the planar micro-nano structure of this embodiment, the surface charge forms two counterclockwise and clockwise directions along the length direction of the first arm 11 of the U-shaped structure 1 and the rectangular bar 2. circulation mode, and the electric field strength is relatively weak; unde...

Embodiment 3

[0044] Based on a planar micro-nano structure capable of producing circular dichroism disclosed in Example 2, the heights of the first arm 11 , the second arm 12 and the rectangular bar 2 are different. The difference between this embodiment and embodiment 2 is: as Figure 9 As shown, the height of the rectangular bar 2 is equal to that of the first arm 11 , but the bottom of the rectangular bar 2 is higher than the horizontal plane of the connecting bar 13 . Its charge distribution diagram, absorption spectrum diagram and circular dichroism spectrum diagram are as follows: Figure 10-12 shown.

[0045] In the wavelength band of λ=720nm, under the irradiation of left-handed polarized light, the planar micro-nano structure of this embodiment forms a counterclockwise circulation mode along the length of the first arm 11 of the U-shaped structure 1 and the rectangular strip 2, and the electric field strength is relatively weak; Under right-hand polarized light irradiation, a cl...

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Abstract

The invention relates to the technical field of micro-nano optics, and specifically relates to a planar micro-nano structure capable of producing circular dichroism. The planar micro-nano structure comprises unit structures, wherein each unit structure comprises a rectangular strip and a U-shaped structure, the rectangular strip and the U-shaped structure are in the same plane, the U-shaped structure comprises a first arm, a second arm and a connection bar, the first arm and the second arm are parallel, the first arm and the second arm are respectively connected with two ends of the connectingbar, the rectangular strip is at one side of the U-shaped structure and is parallel to the first arm, and both the rectangular bar and the U-shaped structure are made of precious metal materials. Therectangular strip is arranged at one side of the U-shaped structure, electric charge distribution on the surface of the U-shaped structure is regulated through a coupling role of the rectangular strip and the U-shaped structure, so as to absorb left polarized light and right polarized light differently, therefore, an electric dipole and a magnetic dipole are generated, a specific circulation pattern is formed, and then a large circular dichroism signal is generated.

Description

technical field [0001] The invention relates to the technical field of micro-nano optics, in particular to a planar micro-nano structure capable of producing circular dichroism. Background technique [0002] The word chirality is derived from Greek and means the symmetry of structure, which has important meaning in many disciplines. An object is said to be "chiral" if it is different from its mirror image, and its mirror image cannot be superimposed on the original object, just as the left and right hands are mirror images of each other and cannot be superimposed. Chirality is the basic characteristic of life process, and most of the organic molecules that make up living organisms are chiral molecules. [0003] According to the published technology, circular dichroism (CD, circular dichroism) is a very important means to study chiral compounds. The positive, negative and spin spectra of the Cotton Effect (Cotton Effect) at a specific wavelength are left and right. As with ...

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 温小静
Owner HANSHAN NORMAL UNIV
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