Characteristics of superconducting flux flow transistors under irradiation of femtosecond laser pulses

Y. Doda, T. Kiwa, I. Kawayama, H. Murakami, M. Tonouchi

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


We have fabricated superconducting flux flow transistors with YBCO thin films and investigated the vortex flow characteristics under the irradiation of femtosecond laser pulses. The vortex flow velocity was calculated by the magnetic field dependence of the flow voltage. The obtained velocity without laser irradiation is 0.08-1.37 × 104 m/s for the bias current IB = 0.4-0.8 mA. The flow voltage increased gradually when the irradiated laser power was up to 10 mW, however, it increased drastically when the laser power was more than 10 mW. The maximum velocity of 6.3 × 10 4 m/s was obtained at the laser power of 15 mW. The result indicates that the laser pulses excite the vortices and accelerate the vortex velocity.

Original languageEnglish
Pages (from-to)1504-1508
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue numberPART 2
Publication statusPublished - Oct 2003
Externally publishedYes
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: Nov 11 2002Nov 13 2002


  • Femtosecond laser pulses
  • SFFT

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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