Observation of magnon cross-Kerr effect in cavity magnonics
- URL: http://arxiv.org/abs/2112.13807v1
- Date: Mon, 27 Dec 2021 17:52:08 GMT
- Title: Observation of magnon cross-Kerr effect in cavity magnonics
- Authors: Wei-Jiang Wu, Da Xu, Jie Qian, Jie Li, Yi-Pu Wang, and J. Q. You
- Abstract summary: In cavity magnonics, we show both experimentally and theoretically the cross-Kerr-type interaction between the Kittel mode and HMS mode.
Our results will bring new methods to magnetization dynamics studies and pave a way for novel cavity magnonic devices.
- Score: 14.59692505962837
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: When there is a certain amount of field inhomogeneity, the biased
ferrimagnetic crystal will exhibit the higher-order magnetostatic (HMS) mode in
addition to the uniform-precession Kittel mode. In cavity magnonics, we show
both experimentally and theoretically the cross-Kerr-type interaction between
the Kittel mode and HMS mode. When the Kittel mode is driven to generate a
certain number of excitations, the HMS mode displays a corresponding frequency
shift and vice versa. The cross-Kerr effect is caused by an exchange
interaction between these two spin-wave modes. Utilizing the cross-Kerr effect,
we realize and integrate a multi-mode cavity magnonic system with only one
yttrium iron garnet (YIG) sphere. Our results will bring new methods to
magnetization dynamics studies and pave a way for novel cavity magnonic devices
by including the magnetostatic mode-mode interaction as an operational degree
of freedom.
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