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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

Active Publication Date: 2019-11-12
清远市天之衡量子科技有限公司
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Problems solved by technology

[0006] The present invention provides a two-dimensional real-time terahertz near-field imaging method and device for the problem that the background technology cannot meet the needs of practical applications, so as to further optimize the terahertz imaging. On the one hand, it can realize two-dimensional imaging, and on the other hand, it can break through the diffraction limit and improve the resolution. rate, and can also perform fast imaging, that is, near-field real-time imaging of terahertz

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[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0037] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second" and ...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/44G01N21/3581G01V8/10
CPCG01J3/4406G01N21/3581G01V8/10
Inventor 秦源陈志文李润泽林雅益黄巍
Owner 清远市天之衡量子科技有限公司
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