Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 35: Poster 2
MA 35.3: Poster
Donnerstag, 8. September 2022, 16:00–18:00, P4
Towards Integration: On-chip Excitation of Spin Waves using Meander Antennas tailored to practical Applications — •Johannes Greil1, Martina Kiechle1, Matthias Golibrzuch1, Ádám Papp2, György Csaba2, and Markus Becherer1 — 1Technical University of Munich (TUM), Germany — 2Pázmány Peter Catholic University, Budapest, Hungary
Albeit spin-wave (SW) computation principles are understood well, integrating SW-based devices makes an efficient excitation of SWs inevitable. Electrical measurements are performed most conveniently with inductive antennas that transfer radio frequency (RF) power into the SW system and pick up the output signals.
We demonstrate the realization of broadband efficient excitation of SWs with meander antennas in a chip-on-platform system. The platform is a PCB that carries the RF signal to a 100nm thin YIG film with metallized bond pads and meander antennas on top. Despite the lower spectral bandwidth of meander antennas compared to CPW structures they have better impedance matching over a wide frequency range and thus provide efficient SW excitation.
We also demonstrate a new design for a dual-wavelength spin wave antenna that consists of a meander structure with two linewidths and gap sizes. Feeding the antenna with two RF frequencies enables for simultaneous excitation of SWs with two wavelengths at one magnetic bias field. Thus, it can be seen as a first realization of purely SW frequency modulation or as the basis for SW-based frequency-division multiplexing (FDM) with two sub-bands.