2015 Fiscal Year Annual Research Report
単色・広帯域周波数可変(0.3~3THz)固有ジョセフソン連続波発振器
Project/Area Number |
25289108
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Research Institution | National Institute for Materials Science |
Principal Investigator |
WANG Huabing 国立研究開発法人物質・材料研究機構, 超伝導物性ユニット, 主幹研究員 (70421427)
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Co-Investigator(Kenkyū-buntansha) |
羽多野 毅 国立研究開発法人物質・材料研究機構, 科学情報室, 特別研究員 (50354337)
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Keywords | マイクロ波 / ミリ波 / テラヘルツ波 |
Outline of Annual Research Achievements |
In this fiscal year, we have mainly obtained the following results for studying THz emitters using intrinsic Josephson junctions. 1.To understand the mechanism, we utilized low temperature scanning laser microscopy (LTSLM) to visualize the EM resonance modes inside the THz emitter, and detected the emission outside the THz emitter simultaneously. Apart from visualization of pronounced patterns of different resonance modes, we also observed the transition between several different modes while varying the bias voltage. 2.To fully control THz emitters, we fabricated a 3-terminal THz emitter, and successfully varied the emission power up to 10 times. Using LTSLM, we can increase the emission power by up to 75% by heating the sample with a focused laser beam. 3.To increase the THz emission frequency, we used a sandwiched structure, with which the emission frequency can up to 1.3 THz, and 2.4 THz with the same structure by different group. The operation temperatures can be increased up to 85 K. Therefore, we fabricated a THz flash which can be driven by a 1.5 V battery. The operation can be in liquid nitrogen.
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Research Progress Status |
27年度が最終年度であるため、記入しない。
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Strategy for Future Research Activity |
27年度が最終年度であるため、記入しない。
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Causes of Carryover |
27年度が最終年度であるため、記入しない。
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Expenditure Plan for Carryover Budget |
27年度が最終年度であるため、記入しない。
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Research Products
(6 results)