Development of resonator-coupled Bi-2212 single crystal oscillator a with emission frequencies greater than 1 THz

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03973
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Electronic materials/Electric materials
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Takahiro Kato 長岡技術科学大学, 工学研究科, 助教 (10432098)
• Co-Investigator(Kenkyū-buntansha): 山田 容士 島根大学, 総合理工学研究科, 教授 (10362906) ; 川上 彰 国立研究開発法人情報通信研究機構, 未来ICT研究所フロンティア創造総合研究室, 主任研究員 (90359092)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: テラヘルツ発振器 / 超伝導

Outline of Final Research Achievements

We have proposed a the resistively shunted Bi-2212 oscillator coupled with a strip-line resonator to get over 1 THz emission. Although it was possible to obtain device parameters by numerical calculation, it was difficult to control the difference in individual junction characteristics, so that coupling between the oscillator and the resonator could not be achieved. For this reason, self heating was evaluated from experiments and numerical calculations to reduce the self-heating effect, which is one of the causes of limiting the oscillation frequency of Bi-2212 oscillators. As a result of improving the fabrication process based on experiment results and numerical results, the temperature rise due to self-heating of the oscillator was suppressed.　And we succeeded in observing electromagnetic radiation of 1.12 THz at the maximum.

Free Research Field

超伝導エレクトロニクス