Propagation Characteristics Of High-Throughput Terajet Beam And Its Super Resolution Thz Imaging

Broad-bandwidth spectral analysis is one of important advantages of terahertz (THz) imaging technology, while low spatial resolution restricts its further applications. In contrast to the contradiction between the high-resolution and the low-throughput as well as narrow-bandwidth in the existing THz near-field imaging technologies, a high-resolution, high-throughput and broad-bandwidth terahertz imaging method is proposed in this work based on the terajet effect produced by a dielectric semi-sphere 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 width.