Free-space electrooptic sampling of terahertz radiation from optically excited superconducting YBa2Cu3O7-δ thin films

Po Iem Lin*, Kaung-Hsiung Wu, Jenh-Yih Juang, Jiunn-Yuan Lin, T. M. Uen, Y. S. Gou

*此作品的通信作者

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

The characteristics of photogenerated terahertz radiation from a current-biased superconducting YBa2Cu3O7-δ (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 Tc, and a faster time at lower temperatures.

原文English
文章編號1198077
頁(從 - 到)20-24
頁數5
期刊IEEE Transactions on Applied Superconductivity
13
發行號1
DOIs
出版狀態Published - 1 3月 2003

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