Modification of spintronic terahertz emitter performance through defect engineering
Abstract
Spintronic ferromagnetic/non-magnetic heterostructures are novel sources for the generation of THz radiation based on spin-to-charge conversion in the layers. The key technological and scientific challenge of THz spintronic emitters is to increase their intensity and frequency bandwidth. Our work reveals the factors to engineer spintronic Terahertz generation by introducing the scattering lifetime and the interface transmission for spin polarized, non-equilibrium electrons. We clarify the influence of the electron-defect scattering lifetime on the spectral shape and the interface transmission on the THz amplitude, and how this is linked to structural defects of bilayer emitters. The results of our study define a roadmap of the properties of emitted as well as detected THz-pulse shapes and spectra that is essential for future applications of metallic spintronic THz emitters.
Keywords
Cite
@article{arxiv.1901.10011,
title = {Modification of spintronic terahertz emitter performance through defect engineering},
author = {Dennis M. Nenno and Laura Scheuer and Dominik Sokoluk and Sascha Keller and Garik Torosyan and Marco Battiato and Jörg Losch and Alexander Brodyanski and Marco Rahm and Rolf H. Binder and Hans C. Schneider and Rene Beigang and Evangelos Th. Papaioannou},
journal= {arXiv preprint arXiv:1901.10011},
year = {2019}
}
Comments
33 pages, 13 figures