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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
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Unveiling a Pump-Induced Magnon Mode via Its Strong Interaction with Walker Modes.
J W Rao1, Bimu Yao1,2, C Y Wang1
1School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
Physical Review Letters
|February 10, 2023
Summary
We discovered a tunable anticrossing in magnetic materials using microwave pumping. This phenomenon enables the creation of a novel microwave frequency comb based on magnetic dynamics, avoiding charge noise for advanced information processing.
Area of Science:
- Condensed Matter Physics
- Quantum Optics
- Magnonics
Background:
- Spin waves in ferrimagnets exhibit distinct modes, such as Walker modes.
- Microwave pumping can interact with and modify these spin-wave modes.
- Hybrid systems combining magnonics and photonics offer new functionalities.
Purpose of the Study:
- To investigate the interaction between microwave pumping and Walker spin-wave modes in a ferrimagnet.
- To explore the generation of novel magnetic modes induced by pumping.
- To demonstrate a tunable microwave frequency comb based on magnetic dynamics.
Main Methods:
- Placing a ferrimagnet within a microwave waveguide.
- Applying microwave pumping to induce and control spin-wave modes.
- Analyzing the power-dependent anticrossing phenomenon.
- Investigating nonlinear interactions for frequency comb generation.
Main Results:
- Observed power-dependent anticrossing of Walker spin-wave modes.
- Identified a pump-induced magnon mode strongly coupling to Walker modes.
- Demonstrated tunable control of the anticrossing via pump parameters.
- Realized a microwave frequency comb originating from magnetic dynamics, free from charge noise.
Conclusions:
- The observed anticrossing is attributed to a pump-induced magnon mode.
- This phenomenon offers excellent tunability for controlling magnetic dynamics.
- A novel, charge-noise-free microwave frequency comb was realized.
- Hybrid magnonics driven away from equilibrium provides new avenues for coherent information processing.
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