论文标题
极化敏感的Terahertz时域光谱系统无机械运动部件
Polarization-sensitive terahertz time-domain spectroscopy system without mechanical moving parts
论文作者
论文摘要
我们通过使用不包含机械运动部件的系统来报告Terahertz电场矢量波形的测量。众所周知，具有不同重复速率的两个相锁的飞秒激光器可用于执行时间域光谱，而无需使用机械延迟阶段。此外，电磁调节器可用于执行极化测量，而无需旋转任何极化器或波弹。我们通过实验证明了这两种方法的组合，并解释了通过这种系统获得的数据分析。这样的系统提供了一个强大的平台，可以促进基础科学和实际应用中对极化敏感的Terahertz时域光谱的使用。为了进行实验演示，我们改变了偏振器对Terahertz波的极化。
We report on the measurement of terahertz electric-field vector waveforms by using a system that contains no mechanical moving parts. It is known that two phase-locked femtosecond lasers with different repetition rates can be used to perform time-domain spectroscopy without using a mechanical delay stage. Furthermore, an electro-optic modulator can be used to perform polarization measurements without rotating any polarizers or waveplates. We experimentally demonstrate the combination of these two methods and explain the analysis of data obtained by such a system. Such a system provides a robust platform that can promote the usage of polarization-sensitive terahertz time-domain spectroscopy in basic science and practical applications. For the experimental demonstration, we alter the polarization of a terahertz wave by a polarizer.
