標題: Free-space electrooptic sampling of terahertz radiation from optically excited superconducting YBa2Cu3O7-delta thin films
作者: Lin, PI
Wu, KH
Juang, JY
Lin, JY
Uen, TM
Gou, YS
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
關鍵字: femtosecond laser illumination;free-space electrooptic;sampling (FSEOS);nonequilibrium superconductivity;terahertz radiation;YBa2CU3O7-delta (YBCO)
公開日期: 1-Mar-2003
摘要: The characteristics of photogenerated terahertz radiation from a current-biased superconducting YBa2Cu3O7-delta (YBCO) bow-tie antenna were investigated using a free-space electrooptic sampling technique. Picosecond electromagnetic pulses about 450 fs wide were obtained. The frequency spectrum derived by Fourier transforming the picosecond pulses spans over 0.1-4 THz. The dynamics of the quasi-particles optically induced by the ultrafast laser pulse primarily determines the performances of the transient terahertz radiation generated under different operating parameters. The results indicate a characteristic quasi-particle relaxation time of about 2.5 ps close to the critical temperature T-c, and a faster time at lower temperatures.
URI: http://dx.doi.org/10.1109/TASC.2003.811033
http://hdl.handle.net/11536/28083
ISSN: 1051-8223
DOI: 10.1109/TASC.2003.811033
期刊: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
Volume: 13
Issue: 1
起始頁: 20
結束頁: 24
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