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We had proposed and developed a THz-wave apparatus for the nondestructive detection of illicit drugs and hazardous substances hidden in sealed envelopes. In actual inspection, we have proposed the following procedure: First, X- ray pre-inspection is carried out; second, the measurement of scattered THz waves is applied to pick up suspicious mails; and, third, the identification of the drugs is done...
The absence of practical technology to detect illicit drugs or hazardous substances hidden in sealed envelopes by nondestructive methods has made it extremely difficult to prevent them from being smuggled domestically and across international borders. We are developing a prototype apparatus that can identify these substances concealed inside sealed mail without opening it, by taking advantage of the...
We are studying several novel steps toward real-life applications of terahertz waves, such as, i) palmtop terahertz-wave parametric generators, ii) printable terahertz sensors using metal mesh, iii) noninvasive detection of concealed drugs using terahertz wave scattering, iv) observation of MOSFET chips using an infrared laser THz emission microscope, v) monolithic Fabry-Perot resonator for the measurement...
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