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Wave shape recovery for terahertz pulse field detection via photoconductive antenna

机译:通过光电导天线恢复太赫兹脉冲场的波形恢复

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摘要

For photoconductive (PC) antennae used as terahertz (THz) detectors, traditional data processing methods should be improved because the space-charge and radiation field screening effects and the time dependence of photocarriers density have not been considered. Through developing a double-probe-pulse THz detection technique and using an equivalent-circuit model to describe PC antennae, we present a new method to restore the THz-field wave shape from the measurement data of currents between two electrodes on the antenna. This method is verified to be effective through building a special THz time-domain spectroscopy system with double probes. This work is significant for the accurate determination of pulse THz fields.
机译:对于用作太赫兹(THz)检测器的光导(PC)天线,由于未考虑空间电荷和辐射场屏蔽效应以及光载流子密度的时间依赖性,因此应改进传统的数据处理方法。通过开发双探针脉冲太赫兹检测技术并使用等效电路模型来描述PC天线,我们提出了一种从天线上两个电极之间的电流测量数据中恢复太赫兹场波形的新方法。通过构建带有双探针的特殊THz时域光谱系统,该方法被证明是有效的。这项工作对于准确确定脉冲太赫兹场具有重要意义。

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