Enhanced THz radiation from YBCO thin film bow-tie antennas with hyper-hemispherical MgO lens
Enhanced THz radiation from YBCO thin film bow-tie antennas with hyper-hemispherical MgO lens
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具有超半球形 MgO 透镜的 YBCO 薄膜领结天线的增强太赫兹辐射
DOI：
10.1109/77.621910
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发表时间：
1997
影响因子：
1.8
通讯作者：
Y. Murakami
中科院分区：
文献类型：
--
作者：
M. Tonouchi;M. Tani;Z. Wang;K. Sakai;M. Hangyo;N. Wada;Y. Murakami
我们展示了YBCO薄膜的太赫兹（THz）辐射的功率增强。利用飞秒光脉冲辐照超快超电流调制激发出频率超过3 THz的超宽带电磁脉冲。发射到自由空间的最大太赫兹辐射功率达到0.5 /spl mu/W与一个蝴蝶结天线和MgO超半球透镜的组合。我们讨论了辐射功率与温度，激发功率和偏置超电流的关系。
We demonstrate power enhancement of terahertz (THz) radiation from YBCO thin films. An ultra-wide-band electromagnetic pulse, which contains frequency components over 3 THz, was excited by ultrafast supercurrent modulation with femtosecond optical pulse irradiation. The maximum THz radiation power emitted into free space was achieved up to 0.5 /spl mu/W with the combination of a bow-tie antenna and an MgO hyper-hemispherical lens. We discuss the radiation power dependence on temperature, excitation power, and bias supercurrent.