太赫兹数字全息术的研究进展

随着太赫兹成像技术的不断成熟,其空间分辨率和系统信噪比逐渐提高,成像速度逐渐加快,光学信息获取能力逐渐变强,人们对太赫兹成像在基础研究和工业应用的开发也逐渐深入。本文综述了近年来科研人员利用太赫兹数字全息成像系统进行的部分研究工作,包括对平板太赫兹元件的性能表征、对光控太赫兹元件的功能验证、对衍射太赫兹场中的纵向分量进行观测、以及对金属亚波长器件的太赫兹表面波进行分析。这些工作的完成对于太赫兹集成系统的研究和太赫兹成像技术的应用都具有积极的推动作用。

Recent advances in terahertz digital holography

With the maturation of terahertz(THz) imaging technology, the spatial resolution, signal-to-noise ratio, imaging speed and ability acquiring information of the imaging system are gradually enhanced. Researchers have paid more attention to THz imaging applications in fundamental researches and industrial exploitation. In this paper, several recent studies of THz digital holography are reviewed, including performance demonstration of THz planar elements, function validation of optical tunable THz elements, observation of the longitudinal component in diffraction THz fields and analysis of THz surface waves on the metallic sub-wavelength devices. These research works are very valuable for the development of THz integration systems and THz imaging technology.