| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Research Abstract |
To realize thin-film-type terahertz (THz)-wave oscillators using high-temperature superconducting Bi-2212 intrinsic Josephson junctions, key technologies were developed as follows: Cerium dioxide buffer layers with a smooth surface were deposited to increase grain sizes in Bi-2212 thin films fabricated by metal-organic decomposition. A junction impedance for designing antenna-coupled oscillators was calculated from an analytical solution of the coupled sine-Gordon equation. Moreover, resonant modes in a Bi-2212 mesa were estimated from bias dependencies of the radiation power and frequency measured using a THz Fourier-transform spectrometer. These results are useful for fabricating the thin-film THz-wave oscillators for high power generation.
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