Noura Zenbaa
(Faculty of Physics, University of Vienna, Vienna, Austria)
We use a bilayer of YIG/CoFeB to construct waveguides of the directional coupler to induce non-reciprocity in the spin-wave propagation and add new functionalities to the directional coupler. The non-reciprocity due to the symmetry breaking leads to $\Delta$k being different in the two propagation directions when magnetized in the Damon-Eschbach configuration $(+Δk≠-Δk)$. Therefore, the coupling length differs in the two directions. At a frequency, where L$_{-k}$=2L$_{+k}$, the directional coupler operates as a Y-circulator. The spin-wave dispersion curves are numerically investigated in nm-thick bilayers of YIG(100)/CoFeB(40) and YIG(100)/SiO$_2$(5)/CoFeB(40) plane films as well as in nano-scale waveguides and measured using Ferromagnetic Resonance (FMR) spectroscopy and k-resolved Brillouin Light Scattering (BLS) spectroscopy.
Noura Zenbaa
(Faculty of Physics, University of Vienna, Vienna, Austria)
Qi Wang
(Huazhong University of Science and Technology)
Kristýna Davídková
(CEITEC BUT, Brno University of Technology, Brno, Czech Republic)
Sebastian Knauer
(University of Vienna, Faculty of Physics, Boltzmanngasse 5, Vienna, Austria.)
Moritz Ruhwedel
(Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, Kaiserslautern, Germany)
Prof.
Oleksandr Dobrovolskiy
(University of Vienna)
Sabri Koraltan
(Faculty of Physics, University of Vienna, 1090 Vienna, Austria)
Claas Abert
(Faculty of Physics, University of Vienna, 1090 Vienna, Austria)
Carsten Dubs
(INNOVENT e. V. Technologieentwicklung, Prüssingstraße 27 B, Jena, Germany.)
Michal Urbánek
(CEITEC BUT, Brno University of Technology, Purkyňova 123, Brno, Czech Republic.)
Prof.
Philipp Pirro
(Fachbereich Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, Kaiserslautern, Germany)
Dieter Suess
(Faculty of Physics, University of Vienna, 1090 Vienna, Austria)
Andrii Chumak
(University of Vienna, Faculty of Physics, Boltzmanngasse 5, Vienna, Austria.)
There are no materials yet.
