Development of real-time 2D THz spectroscopy using ultra-short electron beam

我们在紧凑型电子直线加速器的基础上，利用高功率太赫兹光源研制了高功率太赫兹时域光谱装置。采用S波段紧凑型直线加速器，利用偏振控制的相干跃迁辐射产生了高功率的太赫兹波。采用电光采样法构建了太赫兹-CTR-TDS系统。利用该系统成功地测量了太赫兹的时间波形。在不久的将来，我们将利用啁啾探测激光器进行单次测量，以提高系统的稳定性，扩大测量光谱范围。

We have developed the high-power THz time-domain spectroscopy using the high-power THz source on the basis of the compact electron linac. The high-power THz wave has been generated using coherent transition radiation (CTR) with polarization control for THz time domain spectroscopy (THz-TDS) with the S-band compact linac at AIST. The THz-CTR-TDS System has been constructed with EO sampling method. As a result, the THz temporal waveform has been successfully measured with this system. In near future, we will perform the single-shot measurement with a chirped probe laser in order to improve the stability of this system and to extend the measured spectral range.