Terahertz radiation from YBCO thin film log-periodic antennas

被引：16
|
作者：
Tonouchi, M [1 ]
Saijo, H [1 ]
机构：
[1] Osaka Univ, Res Ctr Superconductor Photon, Suita, Osaka 5650871, Japan
来源：
JOURNAL OF SUPERCONDUCTIVITY | 2003年 / 16卷 / 05期
关键词：
THz radiation; femtosecond laser; YBCO; log-periodic antenna; polarization;
D O I：
10.1023/A:1026211103543
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study terahertz (THz) radiation properties from YBa2Cu3O7-delta (YBCO) thin film log-periodic antennas. Three sets of wire grid polarizers are employed to characterize the frequency-dependent polarization of the THz beam excited with a femtosecond laser. The polarized radiation has clear resonance at frequencies corresponding to the antenna structures. InSb hot-electron bolometer is used to estimate the radiation power after being calibrated in the THz beam generation and detection system. The radiation power increases quadratically with increasing bias current and reaches over 20 muW in the average at an excitation power of 98 m W.
引用
收藏
页码：867 / 871
页数：5
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