Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 22: Terahertz spintronics
MA 22.1: Vortrag
Dienstag, 2. April 2019, 14:00–14:15, H52
Roadmap for THz Generation from Metallic Spintronic Emitter — •Laura Scheuer1, Dennis Nenno1, Garik Torosyan2, Sascha Keller1, Alexander Brodyanski3, Rolf Binder4, Hans Christian Schneider1, René Beigang1, and Evangelos Papaioannou1 — 1Fachbereich Physik der TU Kaiserslautern und Landesforschungszentrum OPTIMAS, 67663 Kaiserslautern, Germany — 2Photonic Center Kaiserslautern, 67663 Kaiserslautern, Germany — 3Institut für Oberächen- und Schichtanalytik (IFOS) and Landesforschungszentrum OPTIMAS, 67663 Kaiserslautern, Germany — 4College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA
Spintronic ferromagnetic/nonmagnetic heterostructures are novel and easily fabricated sources for the generation of THz radiation with large bandwith.
The key technological and scientific challenge of THz spintronic emitters is to understand and engineer their THz emission amplitude and bandwidth. Here, we pave the way to define and manipulate both.
We correlate the THz signal amplitude and its bandwidth with the electron-defect scattering lifetime and the interface transmission for spin-polarized, non-equilibrium electrons.
We experimentally and theoretically prove that epitaxial heterostructures contribute to a significant enhancement of signal amplitude. The results of our study define a roadmap for the properties of the emitted and detected THz pulse shapes and spectra that is essential for future applications of metallic spintronic THz emitters.