摘要
Three-dimensional(3D)terahertz(THz)imaging or THz tomography has recently proven to be useful for nondestructive testing of industrial materials and structures.In place of previous imaging techniques such as THz pulsed/continuous-wave radar and THz computed tomography,we propose a THz optical coherence tomography using photonics-and electronics-based THz sources,and demonstrate thickness measurement and tomographic imaging in frequency regions from 400 to 800 GHz.
