Development of ultrafast optical interfaces for single flux quantum devices

单通量量子器件超快光学接口的开发

• 批准号: 21200059
• 负责人: KAWAYAMA Iwao
• 金额: $ 17.06万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Innovative Areas (Research a proposed research project)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21200059/
• 关键词: 超伝導; 光応答; 光インターフェイス; 磁束量子; 高速光デバイス; フェムト秒パルスレーザー; 光生成磁束; 超伝導論理回路; 磁気光学顕微鏡; 超伝導; 光応答; 光インターフェイス; 磁束量子; 高速光デバイス; フェムト秒パルスレーザー; 光生成磁束; 超伝導論理回路; 磁気光学顕微鏡

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.

通过使用电压自相关技术测量了飞秒激光脉冲的辐射，在Josephson连接（JJS）和超导体桥（SBS）中产生的电压脉冲（SBS）通过电压自相时分辨率进行测量。结果，我们可以观察到光诱导的电压的快速和缓慢的组件，它们比几个picseconds短，分别比几纳米秒更长，而JJS和SBS则更长。已经构建了扫描激光磁光显微镜，并可以观察到单个通量量子的调节。