Speaker
Dr
Verena Brehm
(TU Eindhoven)
Description
Upconversion is an intriguing process where driving of a low-frequency mode allows the occupation of a higher-frequency mode. We specifically focus on magnonic upconversion in the antiferromagnetic material YFeO3. By strongly pumping the low-frequency (qFM) mode with a laser pulse, the high-frequency (qAFM) mode is populated, as recently demonstrated experimentally [1]. Using a macrospin model, we propose two new ways to make this upconversion process more efficient: (I) By applying a static external magnetic field, and (II) by hybridizing the magnon modes with optical cavity modes.
[1] Zhang et al., Nature Physics 20, 801–806 (2024)
Author
Dr
Verena Brehm
(TU Eindhoven)