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terahertz thz wave
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     The applications of Terahertz(THz) wave in illicit drugs inspection and the progress were introduced.
     介绍了太赫兹电磁波在毒品检测中的应用研究结果;
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     Terahertz wave and the spectral technology
     THz波及其光谱检测技术
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     Science and Technology of Terahertz Wave
     太赫兹波科学与技术
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     THz Wave and Its Application in Illicit Drugs Inspection
     太赫兹波及其在毒品检测中的应用
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     The research progress of THz terahertz oscillators and detectors is reviewed.
     本文简要概括了THz电磁波的重要特点、应用价值以及THz辐射源和探测器的最新研究进展。
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  terahertz thz wave
Wide tunable terahertz (THz) wave generation was successfully demonstrated utilizing a grating coupler fabricated on the surface of a LiNbO3 crystal which was pumped by a Q-switched Nd:YAG laser.
      


Terahertz (THz) wave or T - ray, electromagnetic radiation in a frequency interval from 0.1 to 10 THz, is the next frontier in imaging science and technology. THz radiation, or THz wave, occupies a large portion of the electromagnetic spectrum between the infrared and microwave bands (in different units: 1 THz or 1 ps or 300 μm or 33 cm-1 or 4.1 meV or47.6°K.). However, compared to the relatively well-developed medical imaging at microwave and optical frequencies,...

Terahertz (THz) wave or T - ray, electromagnetic radiation in a frequency interval from 0.1 to 10 THz, is the next frontier in imaging science and technology. THz radiation, or THz wave, occupies a large portion of the electromagnetic spectrum between the infrared and microwave bands (in different units: 1 THz or 1 ps or 300 μm or 33 cm-1 or 4.1 meV or47.6°K.). However, compared to the relatively well-developed medical imaging at microwave and optical frequencies, basic research, new initiatives and advanced technology developments in the THz band are very limited. THz band is a scientifically rich but technologically limited frequency band, due to the less developed THz wave emitters and receivers, compared with its neighboring bands (microwave and optical bands) . During the past decade, THz waves have been used to characterize the electronic, vibrational and compositional properties of solid, liquid and gas phase materials. It is a common belief that the future ' killer-application ' of THz waves will be in biomedicine. This article overviews terahertz wave generation, propagation, detection, and application, with emphasis on state-of-the-art science and technology.

本文介绍了太赫兹波的一些重要性质,太赫兹波的产生和探测技术,以及目前国际上在太赫兹波的基础研究和应用基础研究方面的最新进展,并简单讨论了太赫兹波技术的发展前景。

The terahertz (THz) wave generated in periodically poled lithium niobate (PPLN) forward propagation and backward propagation, and the surface-emitted THz radiation were investigated based on the theory of optical parametric oscillator first. Next the tunable of THz wave of temperature, grating period, the incident angle and the radiation angle were given. Thirdly, the bandwidth of the wavelength and the frequency of THz wave were analyzed, and the analytic expressions...

The terahertz (THz) wave generated in periodically poled lithium niobate (PPLN) forward propagation and backward propagation, and the surface-emitted THz radiation were investigated based on the theory of optical parametric oscillator first. Next the tunable of THz wave of temperature, grating period, the incident angle and the radiation angle were given. Thirdly, the bandwidth of the wavelength and the frequency of THz wave were analyzed, and the analytic expressions were given. The theoretical results fit well with the experimental results given by Y.S. Lee et al.At last, the bandwidth of temperature, grating period, the incident angle and the radiation angle were given.

首先采用光参量振荡的机理研究了THz波在准相位匹配媒质周期极化铌酸锂晶体中同向传播与反向传播情况下 ,以及THz波从晶体表面辐射产生的特性 ;其次研究了THz波的温度调谐特性、极化反转光栅周期调谐以及改变入射泵浦光与光栅波矢夹角的调谐特性 ;然后分析了THz波谱宽特性 ,给出解析表达式 ,并与实验结果进行了比较 ,证明理论分析结果与Y .S .Lee等人所给出的实验结果符合很好 ;最后分析了THz波的稳定性与温度、光栅周期、泵浦入射角以及辐射角的关系

Terahertz(THz) wave and its unique properties were briefly introduced. The application of THz wave on aviation and spaceflight was summarized, and the latest research of THz wave for inspecting the defects in foam insulation of space shuttle Columbia was introduced in detail.

简要介绍了太赫兹波的产生、探测方法和主要特点。综述了国内外在太赫兹波领域的研究进展。以太赫兹波技术对航天飞机燃料箱绝热泡沫层成功检测为例,阐述了太赫兹波无损检测新技术的特点、适用条件和在航空航天领域的应用。

 
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