Transmission terahertz waveguide-based imaging below the diffraction limit
Transmission terahertz waveguide-based imaging below the diffraction limit
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DOI：
10.1063/1.1942637
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发表时间：
2005-05
影响因子：
4
通讯作者：
M. M. Awad-M.;R. Cheville
中科院分区：
文献类型：
--
作者：
M. M. Awad-M.;R. Cheville
使用太赫兹线源从近色散自由平行板波导，我们展示了宽带成像在太赫兹频率与亚波长图像分辨率。太赫兹辐射耦合到平行板波导中，板间距为100μm，作为成像孔径。图像数据以投影形式收集，并使用滤波反投影算法重建最终图像，类似于X射线计算机断层扫描中的算法。使用基于波导的线源拍摄的图像表现出比使用共焦圆柱透镜设置可以实现的更高的分辨率。
Using a terahertz line source from a near dispersion-free parallel plate waveguide, we demonstrate broad bandwidth imaging at terahertz frequencies with subwavelength image resolution. Terahertz radiation is coupled into a parallel plate waveguide with a 100μm plate spacing, which serves as the imaging aperture. The image data are collected as projections and the final image is reconstructed using the filtered back-projection algorithm, similar to that in x-ray computed tomography. Images taken using a waveguide-based line source demonstrate higher resolution than can be achieved using a confocal cylindrical lens setup.