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- W2890944846 abstract "In this work, we experimentally demonstrate magnetic modulation of mid-infrared (mid-IR) plasmon resonances in microantenna and hole-array metamaterial platforms made of Ni81Fe19/Au multilayers. The responsible mechanism is the magnetorefractive effect linked to the giant magnetoresistance (GMR) present in this system. Ni81Fe19/Au multilayers experience a modification in the electrical resistivity upon the application of a small magnetic field. This directly translates into a change in the optical constants of the multilayer, making it possible to magnetically modulate the plasmon resonances. Because GMR acts on conduction electrons, the optical modulation occurs in the low energy, mid-IR range, even being possible to extend it to the THz range. Electrodynamical calculations confirm the experimental observations. This approach improves by up to 2 orders of magnitude previous attempts for mid-IR magnetic modulation, is potentially ultrafast due to the characteristic spintronics dynamics, and establishes a roadmap for spintronically controlled devices in the whole mid-IR to THz band." @default.
- W2890944846 created "2018-09-27" @default.
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- W2890944846 date "2018-09-14" @default.
- W2890944846 modified "2023-10-17" @default.
- W2890944846 title "Metamaterial Platforms for Spintronic Modulation of Mid-Infrared Response under Very Weak Magnetic Field" @default.
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- W2890944846 doi "https://doi.org/10.1021/acsphotonics.8b00866" @default.
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