Meta-waveguide-based computed tomography for terahertz super-resolution imaging
Abstract
A lens-free terahertz computed tomography method based on metamaterial waveguide (meta-waveguide) is proposed. In this method, the meta-waveguide replaces the traditional terahertz lens or mirror. It not only inherits the low-loss transmission performance of the waveguide but also breaks through the diffraction limit and achieves subwavelength focusing. Its focusing distance is greater than the Rayleigh length, which is helpful for Radon scanning and tomography imaging. The focusing and transmission characteristics of terahertz in meta-waveguide are analyzed, and the principle of meta-waveguide-based computational tomography system is presented. Then, a 3D printing and copper plating method was proposed for processing the meta-waveguides. Finally, a 0.1 THz Radon tomography scanning system was established. High quality terahertz images with a resolution of 1/3 of the wavelength were obtained, and the three-dimensional image of biological tissue (artificial blood vessel) was acquired.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (10)
Xinyu Li
Cell and Molecular Biology Program
Zhengxin Wang
Lesiqi Yin
Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Institute of Modern Optics, Nankai University , Tianjin 300350,
Tiansheng Cui
Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Institute of Modern Optics, Nankai University , Tianjin 300350,
Huiqi Jiang
Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Institute of Modern Optics, Nankai University , Tianjin 300350,
Minghui Deng
Bohao Chen
Xingchen Wei
Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology, Institute of Modern Optics, Nankai University , Tianjin 300350,
Cheng Gong
Weiwei Liu
College of Materials Science and Engineering, College of Environment, State Key Laboratory of Advanced Separation Membrane Materials, Zhejiang Key Laboratory of Low-carbon Control Technology for Industrial Pollution