Journal
NATURE COMMUNICATIONS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-26011-6
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Funding
- US National Science Foundation [ECCS1933297, ECCS-1933301, ECCS-1933324]
- Air-Force Office of Scientific Research [FA9550-19-1-0254]
- Center for Hybrid Organic Inorganic Semiconductors for Energy (CHOISE), an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
- U.S. Department of Energy, Office of Science, Materials Science Engineering Division [DE-SC0012509]
- U.S. Department of Energy, Office of Science, Basic Energy Science [DEAC02-06CH11357]
- Ames Laboratory
- U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division [DE-AC02-07CH11358]
- US National Science Foundation, National Nanotechnology Coordinated Infrastructure, NNCI [ECCS-1542015]
- National Cancer Institute of the US National Institutes of Health [P30CA016086]
- Michigan Space Grant Consortium
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This study reports the observation of asymmetric spintronic-THz radiation in Two-Dimensional Hybrid Metal Halides (2D-HMH), which can be mutually controlled by the direction of applied magnetic field and linear polarization of the laser pulse. The findings demonstrate the capability for the coherent control of THz emission from 2D-HMHs and provide a promising solution for future THz emitters.
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. Terahertz radiation has wide array of potential uses, however, finding robust and tunable sources of terahertz radiation has been challenging. Here, Cong et al demonstrate a room temperature terahertz source composed of a two-dimensional hybrid metal halide and ferromagnetic heterostructure.
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