4 November 2010 Far-infrared in vivo signature of human skin by terahertz time-domain spectroscopy using waveform rebuilding technology
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Abstract
We present terahertz time-domain spectroscopy characterization of human thumb skin in reflection measurement mode with waveform rebuilding technology. The thumb skin contacts one side of a high resistive silicon wafer with 3 mm thick, and here is an orthogonal incidence of the THz pulse putting on the other side of the wafer. We rebuild the time domain signal from silicon-skin interface as a sample signal by the signal from the air-silicon interface as a reference and a Fresnel transform function between them. Material parameters were calculated by minimizing the difference between the measured sample waveform and a rebuilt one in time domain. The double Debye model parameters for the thumb skin were fitted. The method has potential to research complex layer-structures in skin if a precise model is built.
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Xiangjun Li, Jianjun Liu, Zhi Hong, "Far-infrared in vivo signature of human skin by terahertz time-domain spectroscopy using waveform rebuilding technology", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 785412 (4 November 2010); doi: 10.1117/12.868453; https://doi.org/10.1117/12.868453
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