Molybdenum disulfide polarization sensitive plasmon detector based on graphical gold nano array

By preparing a patterned gold nanoarray on molybdenum disulfide, the local surface plasmon effect is used to enhance light absorption, the problem of insensitive and low absorption of the molybdenum disulfide photodetector is solved, and the sensitivity detection of polarized light and the improvement of light absorption is achieved.

CN119677189AInactive Publication Date: 2025-03-21UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Application Number
CN202411760485.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-09-02
Filing Date
2024-12-03
Publication Date
2025-03-21
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Molybdenum disulfide photodetector is insensitive to polarized light and has low absorption efficiency, resulting in the inability to effectively detect polarized light.

Method used

By preparing a patterned gold nanoarray on molybdenum disulfide, light absorption is enhanced using local surface plasmon effect, and the absorption rate of molybdenum disulfide to light is adjusted by adjusting the thickness and width of the nanoarray.

Benefits of technology

Sensitive detection of polarized light is achieved, the absorption rate of molybdenum disulfide to light is enhanced, and the problems of polarization insensitive and low absorption are solved.

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Abstract

The invention belongs to the field of photoelectricity, and particularly relates to a plasmon polarization sensitive detector based on a micro-nano structure. The innovation points are as follows: (1) the light absorptivity of molybdenum disulfide is enhanced by utilizing an electric field generated by a local surface plasmon effect; and (2) the detection of the molybdenum disulfide photoelectric detector on polarized light is realized. According to the main implementation scheme, a graphical gold nanostructure is transferred to molybdenum disulfide, so that detection of the molybdenum disulfide on polarized light is realized; the surface electric field of the molybdenum disulfide is further enhanced through the localized surface plasmon effect generated when the gold nano array is excited, so that the carrier generation rate of the molybdenum disulfide is increased. Compared with a traditional molybdenum disulfide photoelectric detector, the device can detect polarized light, and meanwhile, the absorption rate of molybdenum disulfide to visible light (0.38-0.7 mu m) is enhanced to a certain extent, so that the application scene is greatly widened, and the application range is greatly widened.
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Citation Information

Patent Citations

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