| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
We have developed a highly-sensitive terahertz power sensor for determining very small absolute power at room temperature. In this sensor, heat generated by absorption of terahertz waves is changed into a DC signal with thermoelectric modules. Then, the DC power based on the signal is given to a cooler put on the absorber and its temperature is kept constant. By using this balanced state, the terahertz power is determined by measuring the DC power given to the cooler. A precision measurement of small terahertz power at room temperature that did not need the extremely low temperature environment with liquid helium was achieved by realizing the DC power transformational technology and the temperature control technology. A quantitative measurement at several dozen nanowatts was demonstrated and its uncertainties were analyzed in detail.
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