太赫兹(THz)成像技术，因其具有能量低、透射率高、波谱范围宽等独特的分析能力，已经在生物医学、安全检查、航空航天等领域展现出巨大的优势及潜在的应用价值，但是较低的空间分辨率制约了太赫兹成像技术的进一步应用。太赫兹波通过具有适当折射率的介质结构产生的“太喷射”效应调控亚波长尺寸太赫兹光场，突破衍射极限对显微系统空间分辨率的限制，同时不损失光场能量和光谱信息，实现高通量、超宽谱的远场太赫兹高分辨成像。本文首先介绍基于纳米喷射的微球透镜显微技术，接着介绍基于太喷射的太赫兹显微技术，最后对基于喷射效应的太赫兹高分辨成像技术的前景做了展望。

Terahertz (THz) imaging technology has shown great advantages and potential applications in the fields of biomedicine, security, and aerospace, due to its low energy, high transmittance, wide bandwidth, and unique analysis abilities; while low spatial resolution restricts its further applications. Recently, a high-resolution, high-throughput, and broad-bandwidth THz imaging method has been proposed based on the terajet effect produced by dielectric structures with appropriate refractive index. The terajet beam can break through the restriction of the diffraction limit on the spatial resolution of the microscopic system without losing the energy and spectral bandwidth of the THz field. In this paper, firstly, a white-light nanoscopy based on photonic nanojet produced by microspheres is introduced, then the THz microscopy based on terajet effect produced by mesoscopic dielectric structures is reviewed. Finally, the prospect of THz high resolution imaging technology based on terajet effect is prospected.