Friday, July 10, 2015

Abstract-Optical characteristics of pesticides measured by terahertz time domain spectroscopy

Dong-Kyu LeeJoo-Hiuk Son
Univ. of Seoul (Korea, Republic of)
Giyoung Kim
National Academy of Agricultural Science (Korea, Republic of)
Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 965516 (July 1, 2015); doi:10.1117/12.2184387

In this study, we measured the optical characteristics of pesticides by terahertz time-domain spectroscopy. Pesticide samples were prepared as pellets that were mixed with polyethylene powder and placed in the center of the path of a terahertz electromagnetic (EM) wave in the spectroscopy system. The absorbance of each sample showed obvious differences in absorption peaks. From this result, we showed that these pesticide products had resonance modes in the terahertz range, and this method can be used to make a sensor that is able to measure low concentrations of pesticides in farm produce.
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