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28 September 2023 Charge dynamics in spintronic THz emitters
Georg Schmidt
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Proceedings Volume PC12656, Spintronics XVI; PC126560A (2023) https://doi.org/10.1117/12.2676749
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
In spintronic THz emitters, the initial spin current leads to a local charge accumulation with a subsequent backflow. Although this effect strongly modifies the current profile, it is often not taken into account when the emitted THz radiation is used to extract the spin current physics. We demonstrate that the effect can be modeled using a simple equivalent circuit. It is, however, difficult to disentangle the backflow from the initial current. Besides the theory, we demonstrate that sub-wavelength THz emitters can be used to demonstrate the validity of the model by modifying the emission spectrum in a well-controlled way.
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Georg Schmidt "Charge dynamics in spintronic THz emitters", Proc. SPIE PC12656, Spintronics XVI, PC126560A (28 September 2023); https://doi.org/10.1117/12.2676749
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KEYWORDS
Terahertz radiation
Spintronics
Ultrafast phenomena
Capacitance
Dielectrics
Laser frequency
Laser radiation
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