通过单次太赫兹光谱测量热稠密物质的准直流电导率。

Toward quasi-DC conductivity of warm dense matter measured by single-shot terahertz spectroscopy.

作者信息

Ofori-Okai B K, Descamps A, Lu J, Seipp L E, Weinmann A, Glenzer S H, Chen Z

机构信息

SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.

出版信息

Rev Sci Instrum. 2018 Oct;89(10):10D109. doi: 10.1063/1.5038944.

DOI:10.1063/1.5038944

PMID:30399773

Abstract

We present an experimental setup capable of measuring the near DC conductivity of laser generated warm dense matter using single-shot terahertz time-domain spectroscopy. The setup uses a reflective echelon and balanced detection to record THz waveforms with a minimum detectable signal of 0.2% in a single laser pulse. We describe details of the experimental setup and the data analysis procedure and present single-shot terahertz transmission data on aluminum that has been laser heated to an electron temperature of 0.5 eV.

摘要

我们展示了一种实验装置，该装置能够使用单次太赫兹时域光谱法测量激光产生的热稠密物质的近直流电导率。该装置使用反射式阶梯光栅和平衡检测来记录太赫兹波形，在单个激光脉冲中的最小可检测信号为0.2%。我们描述了实验装置和数据分析程序的细节，并展示了在激光加热至电子温度为0.5电子伏特的铝上的单次太赫兹传输数据。