Branchy tree-shaped plasmon waveguide composite nano-structure synthesis method and optical manipulation method thereof

Abstract

The invention provides a branchy tree-shaped plasmon waveguide composite nano-structure synthesis method and an optical manipulation method thereof. The branchy tree-shaped plasmon waveguide compositenano-structure synthesis method includes a plurality of steps, and each step can be accurately controlled. Thickness of a trunk of a tree-shaped nano-structure and thickness of a branch-shaped nano-structure growing on the trunk can be accurately controlled. quantum dots with / without housings are overlaid on the surface of the tree-shaped nano-structure to form a quantum dot composite tree-shapednano-structure, and the quantum dots without housings can be applied to chemocatalysis, environment monitoring, biosensing and other fields. When incidence of light occurs from one end of a nano wire, through the nano wire and the branch-shaped structure, the quantum dots with housings are excited to emit light, so that the branchy tree-shaped plasmon waveguide composite nano-structure synthesismethod and the optical manipulation method thereof can be applied to remote sensing Raman, novel lasers and other fields. Besides, through optical manipulation, the intensity and the polarization of the incident light can be changed, and then the quantum dots in a specific region can be controlled to emit light, so that the crosstalk effect, between scattering centers, interfering generation of diffraction effect, can be eliminated. Therefore, the branchy tree-shaped plasmon waveguide composite nano-structure synthesis method and the optical manipulation method thereof can be used for high resolution detection of sub-wavelength.

Description

technical field [0001] The invention relates to the fields of nanomaterials and chemical biology, in particular to a method for synthesizing and optically manipulating a multi-branch plasmon waveguide composite nanostructure. Background technique [0002] Plasmon waveguides are sub-wavelength waveguides that can confine photons to be transmitted near the surface of the waveguide, thereby breaking through the diffraction limit and manipulating photons on the sub-wavelength or even nanometer scale. Interconnection, solar cells and many other aspects have broad application prospects and have received extensive research attention. Silver nanowire is a kind of plasmonic waveguide, which has attracted extensive research because it can be synthesized in large quantities by chemical methods, and is non-toxic and harmless. However, at the same frequency, the wave vector of surface plasmons is larger than that of light, which prevents silver nanowires from being directly excited by p...

AI Technical Summary

Problems solved by technology

The existing micro-nano optical structures are densely arranged in the scattering centers, and when the distance between adjacent scattering centers is relatively close, interference and diffraction between scattered waves are likely to occur, causing crosstalk

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