Microprobe scattering type terahertz waveband dielectric constant detecting device

A dielectric constant and detection device technology, applied in the field of terahertz technology applications, can solve the problems of inability to detect the dielectric constant of micro-nano-scale samples, detection accuracy, deficiency, and upper limit of resolution, and achieve high integration, Simplifies complex work and highly operable effects
CN106443201AInactive Publication Date: 2017-02-22JILIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JILIN UNIV
Publication Date
2017-02-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a microprobe scattering type terahertz waveband dielectric constant detecting device. The microprobe scattering type terahertz waveband dielectric constant detecting device consists of a first infrared laser (1), a second infrared laser (2), a front-end polarization maintaining fiber (3), a coupling beam splitter (4), a rear-end polarization maintaining fiber (5), a THz wave transmitting antenna (6), a THz wave beam splitting plate (7), a THz wave reflector (8), a first motivation ceramic (9), a micro-nano probe (11), a second motivation ceramic (17), a paraboloidal mirror (10), a THz wave power detector (14), a function generator (16) and a lock-in amplifier (20). Signals which are related to samples can be acquired accurately, and the dielectric constant of the samples is calculated by a calculating method based on a detection result. The microprobe scattering type terahertz waveband dielectric constant detecting device has the characteristics of high resolution ratio, high flexibility and high operationality, has ability of testing on a plurality of frequency bands and frequency points, and brings convenience for multi-disciplinary research on mesoscale.
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Description

technical field

[0001] The invention relates to the application field of terahertz (THz) technology, in particular to a microprobe scattering-type terahertz band sample permittivity detection device at the mesoscopic scale. Background technique

[0002] THz technology is an emerging science and technology. Many materials, structures or biological macromolecules have unique fingerprint spectrum responses in the THz band, and these characteristics are not available in other electromagnetic bands, so they can be used as an important tool for material identification and identification. means. Among them, the detection of dielectric constant is one of the important methods of material identification. In addition, it is also of great significance to study the process of material change (such as biological tissue or cell) according to the dielectric constant.

[0003] At present, to detect the dielectric constant of a substance in the THz band, it is necessary to use a far-field T...

Claims

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