2016 Fiscal Year Final Research Report
Study of low-noise superconducting parametric amplifier aiming at sensitivity enhancement of terahertz receivers
Project/Area Number |
26420305
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Electron device/Electronic equipment
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Research Institution | Shizuoka University |
Principal Investigator |
|
Project Period (FY) |
2014-04-01 – 2017-03-31
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Keywords | カイネティックインダクタンス / パラメトリック増幅 / コプレーナ線路 / 窒化ニオブチタン |
Outline of Final Research Achievements |
We studied superconducting parametric amplifiers (KIT amplifiers) which use a kinetic-inductance nonlinearity of superconducting transmission line to applied current. We fabricated a NbTiN-thin-film coplanar waveguide (CPW), and measured a variation of the kinetic inductance in the microwave region when the DC current was applied to the strip. The measurement results were in good agreement with calculation results, and it was found that the strong nonlinearity is obtained in the CPW with narrow strip width. Based on the results, we designed the KIT amplifier at 0.3 THz. Using a NbTiN-CPW with the strip width of 2 um and the length of 5 cm, the parametric gain more than 10 dB is expected by applying a pumping power of 0.2 mW.
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Free Research Field |
超伝導エレクトロニクス
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