Time-Domain Terahertz Spectroscopy in High Magnetic Fields

TL;DR

This paper reviews the integration of terahertz time-domain spectroscopy with high magnetic fields, highlighting experimental techniques, magnet types, and recent discoveries in condensed matter physics.

Contribution

It provides a comprehensive overview of current methods and recent physical phenomena revealed by terahertz spectroscopy in high magnetic fields.

Findings

Integration of terahertz spectroscopy with high magnetic fields enables new insights.

Comparison of magnet types informs experimental choices.

Recent discoveries include novel physical phenomena in condensed matter.

Abstract

There are a variety of elementary and collective terahertz-frequency excitations in condensed matter whose magnetic field dependence contains significant insight into the states and dynamics of the electrons involved. Often, determining the frequency, temperature, and magnetic field dependence of the optical conductivity tensor, especially in high magnetic fields, can clarify the microscopic physics behind complex many-body behaviors of solids. While there are advanced terahertz spectroscopy techniques as well as high magnetic field generation techniques available, combination of the two has only been realized relatively recently. Here, we review the current state of terahertz time-domain spectroscopy experiments in high magnetic fields. We start with an overview of time-domain terahertz detection schemes with a special focus on how they have been incorporated into optically accessible high-field magnets. Advantages and disadvantages of different types of magnets in performing terahertz time-domain spectroscopy experiments are also discussed. Finally, we highlight some of the new fascinating physical phenomena that have been revealed by terahertz time-domain spectroscopy in high magnetic fields.