Optical Responses of Josephson Vortex Flow Transistors under Irradiation of Femtosecond Laser Pulses

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概要

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• We have fabricated Josephson vortex flow transistors (JVFTs) that consist of a parallel array of Josephson junctions and a control current line to apply the external magnetic field at the junctions. We observed modulations of the flow voltage with a DC current input. From these results, we estimated the mutual inductance and the self-inductance, and calculated the operation frequency of the JVFT. Next, femtosecond laser pulses modulated by an optical chopper were irradiated to the Josephson junction array. As a result, we observed an increase in the output voltage in the current-voltage characteristics, and the clear modulation of the output voltage with the same period as the optical chopping rate. These results suggest that a JFVT can operate as an optical input interface for superconducting circuits.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2007-04-30

著者

• Kawayama Iwao

  Institute Of Laser Engineering Osaka University

• Doda Yasushi

  Institute Of Laser Engineering Osaka University:crest Japan Science And Technology Agency

• Tonouchi Masayoshi

  Institute Of Laser Engineering Osaka University

• Murakami Hironaru

  Institute Of Laser Engineering Osaka University

• Doda Yasushi

  Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan

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