Imaging with terahertz waves.
@article{Hu1995ImagingWT, title={Imaging with terahertz waves.}, author={B. B. Hu and M. Nuss}, journal={Optics letters}, year={1995}, volume={20 16}, pages={ 1716 } }
We present what is to our knowledge the first imaging system based on optoelectronic terahertz time-domain spectroscopy. Terahertz time-domain waveforms are downconverted from the terahertz to the kilohertz frequency range, and the waveform for each pixel is frequency analyzed in real time with a digital signal processor to extract compositional information at that point. We demonstrate applications to package inspection and chemical content mapping in biological objects.
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