Coherent control of asymmetric spintronic terahertz emission from two-dimensional hybrid metal halides

Kankan Cong, Eric Vetter, Liang Yan, Yi Li, Qi Zhang, Yuzan Xiong, Hongwei Qu, Richard D. Schaller, Axel Hoffmann, Alexander F. Kemper, Yongxin Yao, Jigang Wang, Wei You (), Haidan Wen (), Wei Zhang () and Dali Sun ()
Additional contact information
Kankan Cong: Advanced Photon Source, Argonne National Laboratory
Eric Vetter: North Carolina State University
Liang Yan: North Carolina State University
Yi Li: Oakland University
Qi Zhang: Advanced Photon Source, Argonne National Laboratory
Yuzan Xiong: Oakland University
Hongwei Qu: Oakland University
Richard D. Schaller: Center for Nanoscale Materials, Argonne National Laboratory
Axel Hoffmann: Materials Science Division, Argonne National Laboratory
Alexander F. Kemper: North Carolina State University
Yongxin Yao: Ames Laboratory and Department of Physics and Astronomy, Iowa State University
Jigang Wang: Ames Laboratory and Department of Physics and Astronomy, Iowa State University
Wei You: North Carolina State University
Haidan Wen: Advanced Photon Source, Argonne National Laboratory
Wei Zhang: Oakland University
Dali Sun: North Carolina State University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Next-generation terahertz (THz) sources demand lightweight, low-cost, defect-tolerant, and robust components with synergistic, tunable capabilities. However, a paucity of materials systems simultaneously possessing these desirable attributes and functionalities has made device realization difficult. Here we report the observation of asymmetric spintronic-THz radiation in Two-Dimensional Hybrid Metal Halides (2D-HMH) interfaced with a ferromagnetic metal, produced by ultrafast spin current under femtosecond laser excitation. The generated THz radiation exhibits an asymmetric intensity toward forward and backward emission direction whose directionality can be mutually controlled by the direction of applied magnetic field and linear polarization of the laser pulse. Our work demonstrates the capability for the coherent control of THz emission from 2D-HMHs, enabling their promising applications on the ultrafast timescale as solution-processed material candidates for future THz emitters.

Date: 2021
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DOI: 10.1038/s41467-021-26011-6

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