Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.8: Poster
Monday, March 9, 2026, 09:30–12:30, P2
Narrow Band THz Emission from micropatterned STEs — •Nikos Kanistras1, Bikash Das-Mohapatra1, Seth Kurfman1, Quentin Remy2, Reza Rouzegar2, Tobias Kampfrath2, and Georg Schmidt1 — 1Institut für Physik, Martin-Luther Universität Halle Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle, Germany — 2Department of Physics, Freie Universität Berlin, 14195 Berlin, Germany
It has recently been demonstrated that Spintronic THz Emitters (STEs) made of metallic multilayers can be used to create ultrashort and broad band THz emission. Such STEs show great potential to complement or even replace conventional semi conducting THz sources due to their straightforward and cost-effective fabrication techniques resulting in seamless on-chip integration with modern device technologies[1, 2]. While quite often the broad band emission is highly desirable, in some cases narrow band or even single frequency emission is preferred, for example for spectroscopy applications.
In this work we present devices for narrow band emission of THz radiation in the range of 1-20THz, based on CoFeB/Pt STE. The samples use a striped emitter on a wedge of a material with an index of refraction >1 (e.g. glass). Our results demonstrate a viable and straightforward method to produce controlled emission in a deterministic THz frequency band, supported by a simple model.
[1] Seifert, T. et al. Nature Photon 10, 483-488 (2016).
[2] Georg Schmidt et al. Phys. Rev. Appl., 19:L041001, Apr 2023.
Keywords: Spintronic Devices; Tunable emitters; Micropaterning