Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 19: Poster 1
MA 19.47: Poster
Tuesday, September 6, 2022, 17:30–20:00, P2
Spatially Resolved Terahertz Spectroscopy using Spintronic-Terahertz-Emitter — •Bruno Rosinus Serrano1,2, Alex Chekhov1,2, Yannic Behovits1,2, and Tobias Kampfrath1,2 — 1Freie Universität Berlin — 2Fritz-Haber-Institut Berlin
New efficient laser-driven sources provide high THz fields suitable for excitation of ultrafast spin dynamics in various materials. These intense THz pulses are often characterized with a use of infrared and THz cameras also known as focal plane arrays (FPA). Since the FPA output strongly depends on its spectral sensitivity, it is often important to know the transfer function of a given FPA in the corresponding THz range. Here, we develop a table-top technique, which allows one to separate and spatially resolve spectral contributions to the FPA image in the THz range. Our results indicate that the FPA sensitivity can be quite resonant at different frequencies.