Line peak separation method for graphene plasmon-enhanced infrared spectroscopy detection

A technology of plasmon enhancement and spectral line peaking, applied in the field of infrared light detection, can solve the problems of lack of universal significance for trace molecule detection, narrow enhancement band, and improved repeatability
CN105352906BActive Publication Date: 2018-10-30THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Publication Date
2018-10-30

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Abstract

The invention provides a spectral-line peak-value separation method employing graphene plasmons-enhanced infrared spectroscopy detection. The method comprises (1) preparing an infrared enhancing and detection device for a graphene plasmons component; 2) putting a to-be-detected object on graphene microstructure; 3) performing electrical test on the graphene microstructure, concretely, measuring the Ids-Vg transportation curve of graphene, and reading the voltage Vg(CNP) corresponding to the Dirac point of graphene; 4) separating the infrared detection spectral-line peak value by adjusting the grid voltage, and concretely comprising the following steps: a) acquiring the extinction spectrum T (CNP) under the voltage Vg (CNP) corresponding to the Dirac point of graphene, and taking as a background; b) after background acquisition is finished, adjusting the grid voltage Vg to the grid voltage Vg to deviate from the voltage corresponding to the Dirac point of graphene, then acquiring signals of the sample under different voltages, then acquiring the extinction spectrum T (EF) again, and gradually increasing the step length of Vg, so as to enable a peak covered in an intrinsic signal to emerge.
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Description

technical field

[0001] The invention relates to the technical field of infrared light detection, in particular to a spectral line peak separation method for graphene plasmon enhanced infrared spectrum detection. Background technique

[0002] Infrared radiation contains rich objective information, and its detection has attracted much attention. Infrared detectors have covered short-wave, medium-wave and long-wave ranges, and have been widely used in military and civilian fields. Its detection principle is to use the photoelectric conversion performance of the material to convert the photon signal of infrared radiation into an electronic signal, and combine it with an external circuit to achieve the goal of detecting infrared light signals.

[0003] Graphene is a two-dimensional crystal composed of a single layer of carbon atoms, and the thickness of a single layer of graphite is about 0.35nm. Currently, graphite with less than ten layers is regarded as graphene. With excel...

Claims

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