Two-dimensional real-time terahertz near-field imaging method and device

A technology of terahertz near-field and imaging method, applied in the field of optical imaging
CN110440919AActive Publication Date: 2019-11-12清远市天之衡量子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
清远市天之衡量子科技有限公司
Publication Date
2019-11-12

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Abstract

The invention discloses a two-dimensional real-time terahertz near-field imaging method and device, and relates to the technical field of optical imaging. The method comprises the following steps: generating various lasers and a terahertz field, performing coherent excitation on atoms from a base state to a rydberg state by using the various lasers and the terahertz field; converting the terahertzfield into radiated fluorescence; performing field strength calibration through EIT (electromagnetically induced transparency) and AT (Autler-Townes) splitting; and detecting the spatial distributionof the terahertz field through the fluorescence to realize terahertz imaging. Therefore, one-dimensional imaging is changed to two-dimensional imaging, imaging with relatively high time consumption caused by scanning with a probe is changed to real-time imaging, and relatively low resolution is changed to relatively high resolution, so that the aim of optimizing the terahertz imaging is fulfilled, and then a new technical basis is provided for terahertz imaging researches.
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Description

technical field

[0001] The invention relates to the technical field of optical imaging, in particular to a two-dimensional real-time terahertz near-field imaging method and device. Background technique

[0002] As one of the key technologies of terahertz, terahertz imaging has a wide range of applications in security inspection and non-destructive testing.

[0003] Traditional terahertz time-domain spectral imaging technology is affected by the diffraction limit of the wavelength, and the resolution is only a few hundred microns, making it difficult to achieve sub-wavelength imaging measurement; near-field imaging is one of the research methods to break through the diffraction limit and obtain sub-wavelength super-resolution images . Traditional methods based on photoconductive antennas, electro-optic crystals with grids and other methods to obtain images by scanning take a lot of time. Real-time imaging uses a CCD to collect visible light signals converted from terahertz, ...

Claims

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