2015 Fiscal Year Final Research Report
Establishment and Applications of High-power Superconducting Coherent Terahertz Sources
| Project/Area Number |
26790032
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nano/Microsystems
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| Research Institution | University of Tsukuba (2015)
Kyoto University (2014) |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 高温超伝導体 / ジョセフソン効果 / テラヘルツ波 / 温度分布イメージング |
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| Outline of Final Research Achievements |
To enhance the emission power of the CW terahertz sources using intrinsic Josephson junctions in cuprate high-temperature superconductors, we investigate the universal relationship between the hot-spot size and the intensity of terahertz radiation by dynamically controlling the surface temperature distributions. We used a florescent technique to directly image temperature distributions of the emitting sources. We find a strong positive correlation between the emission intensity and the volume of the superconducting parts, and that we can increase emission intensity considerably by preventing the excessive heating that increases hot-spot size. This finding allows for the construction of powerful sources capable of emitting intense terahertz waves.
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| Free Research Field |
超伝導工学
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