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. 2020 Dec 29;14(1):110–129. doi: 10.1007/s12200-020-1101-4

Time-domain terahertz spectroscopy in high magnetic fields

Andrey Baydin 1,✉, Takuma Makihara 2, Nicolas Marquez Peraca 2, Junichiro Kono 1,2,3,✉
PMCID: PMC9743882  PMID: 36637783

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, a combination of the two has only been realized relatively recently. Here, we review the current state of terahertz time-domain spectroscopy (THz-TDS) 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 THz-TDS experiments are also discussed. Finally, we highlight some of the new fascinating physical phenomena that have been revealed by THz-TDS in high magnetic fields.

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Keywords: high magnetic field, terahertz time-domain spectroscopy (THz-TDS)

Acknowledgements

J. K. acknowledges support from the U.S. Army Research Office (W911NF-17-1-0259), the U.S. National Science Foundation (NSF MRSEC DMR-1720595), the U.S. Department of Energy (DEFG02-06ER46308), and the Robert A. Welch Foundation (C-1509).

Footnotes

Andrey Baydin is a postdoctoral scholar in Department of Electrical and Computer Engineering at Rice University, USA. He obtained his Ph.D. degree in Physics from Vanderbilt University, USA in May 2018. His current research interests include ultra-fast spectroscopy of quantum materials and light-matter interaction in the ultrastrong coupling regime.

Takuma Makihara joined Prof. Kono’s laboratory in the spring of 2019, where he focused on terahertz time-domain magnetospectrscopy of orthoferrites using the Rice Advanced Magnet with Broadband Optics. He received his B.S. degree in Physics from Rice University, USA in 2020, and is currently pursuing his Ph.D. at Stanford University, USA with a focus on quantum hardware.

Nicolas Marquez Peraca received his B.S. degree in Physics from University of the Republic in Montevideo, Uruguay in 2016. Before joining Prof. Kono’s laboratory in the fall of 2018, he was a Guest Researcher for two years at National Institute of Standards and Technology in Gaithersburg, MD, USA, where he worked in the electric and opto-electronic characterization of multijunction solar cells. His research interests include ultrafast phenomena in condensed matter physics, terahertz magnetospectroscopy of quantum materials, and quantum technology.

Junichiro Kono is Karl F. Hasselmann Chair in Engineering, Professor in Departments of Electrical & Computer Engineering, Physics & Astronomy, and Materials Science & Nanoengineering, and Chair of Applied Physics at Rice University, USA. He received his B.S. and M.S. degrees in Applied Physics from University of Tokyo, Japan in 1990 and 1992, respectively, and completed his Ph.D. in Physics from State University of New York at Buffalo, USA in 1995. He was a postdoctoral research associate at University of California Santa Barbara, USA from 1995 to 1997, and the W. W. Hansen Experimental Physics Laboratory Fellow in Department of Physics at Stanford University, USA from 1997 to 2000. His current research interests include quantum optics in condensed matter, ultrastrong light-matter coupling, and terahertz science and technology.

Contributor Information

Andrey Baydin, Email: baydin@rice.edu.

Junichiro Kono, Email: kono@rice.edu.

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