Circularly polarized narrowband terahertz radiation from a eulytite oxide by a pair of femtosecond laser pulses
Circularly polarized narrowband terahertz radiation from a eulytite oxide by a pair of femtosecond laser pulses
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DOI：
10.1103/physreva.89.033832
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发表时间：
2014-03
影响因子：
2.9
通讯作者：
R. Takeda;N. Kida;M. Sotome;Y. Matsui;H. Okamoto
中科院分区：
文献类型：
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作者：
R. Takeda;N. Kida;M. Sotome;Y. Matsui;H. Okamoto
我们报告太赫兹辐射诱导的光整流过程中的非中心对称和绝缘氧化物，eulytite，在室温下。辐射的太赫兹脉冲主要由频率为2.01 THz的时间振荡分量组成。这种振荡的产生归因于在2.01 THz下的太赫兹辐射的有效产生长度增加到约2 mm。通过使用一对具有适当间隔、偏振和功率的飞秒激光脉冲，我们成功地控制了辐射太赫兹波的轨迹。这种方法还使我们能够产生2.01 THz的圆偏振窄带太赫兹辐射。
We report on terahertz radiation induced by an optical rectification process in a noncentrosymmetric and insulating oxide, eulytite, at room temperature. The radiated terahertz pulse consists mainly of a temporal oscillation component with a frequency of 2.01 THz. The generation of this oscillation is ascribed to an increase in the effective generation length for the terahertz radiation up to about 2 mm at 2.01 THz. By using a pair of femtosecond laser pulses with an appropriate interval, polarization, and power, we succeeded in controlling the trajectory of the radiated terahertz wave. This method also enabled us to generate circularly polarized narrowband terahertz radiation with 2.01 THz.