2011 Fiscal Year Final Research Report
Development of ultrafast optical interfaces for single flux quantum devices
| Project/Area Number |
21200059
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
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| Allocation Type | Single-year Grants |
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| Research Field |
Electron device/Electronic equipment
Applied optics/Quantum optical engineering
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| Research Institution | Osaka University |
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Principal Investigator |
KAWAYAMA Iwao 大阪大学, レーザーエネルギー学研究センター, 助教 (10332264)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 超伝導 / 光応答 / 光インターフェイス / 磁束量子 |
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| Research Abstract |
Voltage pulses generated in the Josephson junctions (JJs) and superconductor bridges (SBs) by the irradiation of femtosecond laser pulses were measured with sub-picosecond time resolution using a voltage autocorrelation technique. As a result, we could observe fast and slow components of photo-induced voltages, which are shorter than several picoseconds and longer than several nanoseconds respectively, with JJs and SBs. A scanning laser magneto-optical microscope has been constructed and the modulation of single flux quantum could be observed.
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