| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Outline of Final Research Achievements |
We have investigated the feasibility of minute-sample terahertz spectroscopy using a metal parallel-plate waveguide with tapered-structure. We carried out terahertz time-domain spectroscopy of L,L-cystine, powdered samples of which were diluted with hydrocarbon-based grease. These mixed samples were sandwiched between metal parallel plates with several hundred-micrometer gap in the THz transmission measurements. We observed both of the sharp absorption peak and the dispersion feature of the refractive index of L,L-cystine at 24 cm-1. We found that background feature of powdered samples in THz absorption spectra possibly due to THz wave scattering was reduced by diluting the samples with the grease. We also obtained the quantitative THz spectra of L,L-cystine in the absorption coefficient spectrum. We succeeded in THz measurements of one-order of magnitude smaller sample of L,L-cystine relative to the sample amount necessary for the traditional terahertz measurements.
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