Kyoto University · Agricultural and Biological Sciences
Professor Tetsuhito Suzuki's research lab specializes in terahertz spectroscopy and electromagnetic sensing, focusing on the development of advanced analytical techniques for detecting trace chemical substances such as pesticide residues. The lab investigates the interaction of terahertz waves with materials, particularly in complex matrices like biological samples and commercial formulations, to enhance sensitivity and specificity. They also explore metallic mesh sensors for precise thickness measurements using electromagnetic resonance phenomena, combining experimental validation with numerical simulations. Their work bridges analytical chemistry, materials science, and photonics to enable non-destructive, label-free detection technologies.
Figures are computed from collected data and may differ slightly.
The feasibility of terahertz (THz) spectroscopy as a potential pesticide residue analytical tool was evaluated by using cis-permethrin as the test compound. THz spectra were measured by fourier-transform spectroscope at the THz region, frequency range from 20 to 400 cm-1. Freeze-drying was effective to remove interference of water from samples. The absorption wave numbers of cis-permethrin were similar with or without the presence of biological matrix such as spinach, and other pesticide compoun
The effectiveness of metallic mesh sensors to quantitatively measure thickness was evaluated by transmission spectra of sub- μm-thick SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> layers deposited on a 6-μm-thick metallic mesh. Initially, we simulated the transmission spectra and the localized electric field distribution of different-sized periodic structures using the finite difference time domain method. Both the wavelength of the re
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