Journal: Nature Communications

Article Title: Real-time terahertz imaging with a single-pixel detector

doi: 10.1038/s41467-020-16370-x

Figure Lengend Snippet: a Optical image of the leaf, from an Achyranthes aspera plant, used in the experiment. The THz field-of-view is indicated here along with the area illuminated by an intense white-light source (~3 sun illumination). b – h ( i – o ) THz transmission (phase delay) of the leaf shown in part a at different points in time (experimental time shown on top). Note that the transmission images show an average from 0.3 to 0.8 THz, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T=\mathop{\sum }\nolimits_{i = 1}^{{}_{n}}| {E}_{{\mathrm{samp}}}({\omega }_{i})/{E}_{{\mathrm{ref}}}({\omega }_{i})| /n$$\end{document} T = ∑ i = 1 n ∣ E samp ( ω i ) / E ref ( ω i ) ∣ / n , and the phase delay images show the averaged unwrapped phase, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Phi =\mathop{\sum }\nolimits_{i = 1}^{n}{\rm{unwrap}}(\arg ({E}_{{\mathrm{samp}}}({\omega }_{i})/{E}_{{\mathrm{ref}}}({\omega }_{i})))/n$$\end{document} Φ = ∑ i = 1 n unwrap ( arg ( E samp ( ω i ) / E ref ( ω i ) ) ) / n , with the transmission colourscale been inverted. Further, the THz images have been deconvolved, using deconvblind function in Matlab R2016a, by calculating the point-spread function of our imaging system by Fourier optics.

Article Snippet: Further, the THz images have been deconvolved, using deconvblind function in Matlab R2016a, by calculating the point-spread function of our imaging system by Fourier optics.

Techniques: Transmission Assay, Imaging