| Budget Amount *help |
¥25,480,000 (Direct Cost: ¥19,600,000、Indirect Cost: ¥5,880,000)
Fiscal Year 2015: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
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| Outline of Final Research Achievements |
We developed a frequency-domain modulation spectroscopy system in the terahertz (THz) range based on the self-heterodyne technique to enhance the sensitivity of the small spectral change measurement. To evaluate the effectiveness of our system, we measured absorption of the THz wave caused by photo-induced free carriers generated in a high-resistive Si substrate. we confirmed that the sensitivity of the amplitude absorption measurement was enhanced at least 14 dB. Our new system will pave the way for the sensitive measurement of THz spectral changes induced by photoexcitation in chemical, material, and biomedical sciences.
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