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A new approach for precise complex optical parameter of highly absorptive liquid is proposed for transmission THz time-domain spectroscopy. Due to the nature of liquid, indirect measurement of sample thickness increases inaccuracy in optical parameter. Here, we reduced uncertainty in optical parameter through an algorithm optimizing sample thickness by Kramers-Kronig relations. Less than 2% error...
DNA conformational change is proved in THz frequency range. Distinct difference in absorption of condensed and extended DNA is observed. The result suggests that THz spectroscopy identifies global change in DNA structure sensitively.
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