Coherent Control of Asymmetric Spintronic Terahertz Emission from Two-Dimensional Hybrid Metal Halides

ORAL

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.

*US National Science Foundation, ECCS-1933297. Michigan Space Grant Consortium, Air-Force Office of Scientific Research under award no. FA9550-19-1-0254. US National Science Foundation, ECCS-1933301. US National Science Foundation, ECCS-1933324. The Center for Hybrid Organic Inorganic Semiconductors for Energy (CHOISE), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. U.S. Department of Energy, Office of Science, Materials Science and Engineering Division under Contract no. DE-SC0012509. The U.S. Department of Energy, Office of Science, Basic Energy Science, under contract no. DE-AC02-06CH11357. The Ames Laboratory, the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division under Contract No. DEAC02- 07CH11358. US National Science Foundation, Grant ECCS-1542015. National Cancer Institute of the US National Institutes of Health under Award No. P30CA01608

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Publication: Cong, K., Vetter, E., Yan, L. et al. Coherent control of asymmetric spintronic terahertz emission from two-dimensional hybrid metal halides. Nat Commun 12, 5744 (2021).

Presenters

  • Dali Sun

    • North Carolina State University

Authors

  • Dali Sun

    • North Carolina State University

  • Kankan Cong

    • Argonne National Laboratory

  • Eric Vetter

    • North Carolina State University

  • Liang Yan

    • University of North Carolina at Chapel Hill

  • Yi Li

    • Oakland University

  • Qi Zhang

    • Argonne National Laboratory
    • Nanjing University

  • Yuzan Xiong

    • Oakland University
    • Oakland University, Rochester, MI, United States

  • Hongwei Qu

    • Oakland University

  • Richard D Schaller

    • Argonne National Laboratory

  • Axel Hoffmann

    • University of Illinois at Urbana-Champai
    • University of Illinois at Urbana-Champaign
    • Materials Science and Engineering, University of Illinois at Urbana-Champaign

  • Alexander F Kemper

    • North Carolina State University

  • Yongxin Yao

    • Ames Lab
    • Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, USA

  • JIGANG Wang

    • Iowa State University

  • Wei You

    • University of North Carolina at Chapel Hill

  • Haidan Wen

    • Argonne National Laboratory

  • Wei Zhang

    • Oakland University
    • Oakland University, Rochester, MI, United States