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4 November 2016 THz spectroscopy for THz spintronics (Conference Presentation)
Thomas Huisman
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Proceedings Volume 9931, Spintronics IX; 99311I (2016) https://doi.org/10.1117/12.2235682
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
Abstract
Controlling currents using circularly polarized light and spin-orbit coupling could lead to the development of ultrafast spintronic devices driven by laser pulses and operating at the femtosecond timescale. Here we demonstrate that such a helicity dependent photocurrent can be generated in metallic heterostructures consisting of a single ferromagnetic layer and a non-magnetic one. In particular, using terahertz emission spectroscopy we show that the direction of the generated ultrafast photocurrent is controlled by the helicity of light, the magnetization of the ferromagnetic layer and the growth direction of the layers. We argue that the helicity and magnetization dependent photocurrent in metallic multilayers originates from a combination of the spin-orbit interaction and a lack of center of symmetry at the interface.
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Thomas Huisman "THz spectroscopy for THz spintronics (Conference Presentation)", Proc. SPIE 9931, Spintronics IX, 99311I (4 November 2016); https://doi.org/10.1117/12.2235682
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KEYWORDS
Terahertz radiation
Spintronics
Ferromagnetics
Spectroscopy
Emission spectroscopy
Femtosecond phenomena
Heterojunctions
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