Generation of longitudinally polarized terahertz pulses with field amplitudes exceeding 2 kV/cm
Generation of longitudinally polarized terahertz pulses with field amplitudes exceeding 2 kV/cm
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DOI：
10.1063/1.4901904
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发表时间：
2014-11-10
影响因子：
4
通讯作者：
Jamison, S. P.
中科院分区：
文献类型：
--
作者：
Cliffe, M. J.;Rodak, A.;Jamison, S. P.
我们演示了使用大面积径向偏置光导天线产生近单周期纵向极化太赫兹辐射，其纵向场振幅超过2 kV/cm。采用0.5 mJ放大近红外飞秒激光系统光激发76 mm直径的天线，并在同轴电极上施加高达100 kV的偏置电压。使用校准的电光检测方案测量了源的横向和纵向场分量的振幅。通过对光导天线发射的辐射进行紧密聚焦，我们得到了最大纵向场振幅为2.22 kV/cm，外加偏置场为38.5 kV/cm。(C) 2014作者。
We demonstrate the generation of near-single cycle longitudinally polarized terahertz radiation using a large-area radially biased photoconductive antenna with a longitudinal field amplitude in excess of 2 kV/cm. The 76 mm diameter antenna was photo-excited by a 0.5 mJ amplified near-infrared femtosecond laser system and biased with a voltage of up to 100 kV applied over concentric electrodes. Amplitudes for both the transverse and longitudinal field components of the source were measured using a calibrated electro-optic detection scheme. By tightly focusing the radiation emitted from the photoconductive antenna, we obtained a maximum longitudinal field amplitude of 2.22 kV/cm with an applied bias field of 38.5 kV/cm. (C) 2014 Author(s).