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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
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Triple-Resonant Brillouin Light Scattering in Magneto-Optical Cavities
J A Haigh1, A Nunnenkamp2, A J Ramsay1
1Hitachi Cambridge Laboratory, Cambridge CB3 0HE, United Kingdom.
Physical Review Letters
|October 8, 2016
Summary
Researchers enhanced light scattering using magneto-optical resonators. This breakthrough enables efficient coherent optical-to-microwave conversion by precisely controlling light-magnon interactions.
Area of Science:
- Optics
- Condensed Matter Physics
- Photonics
Background:
- Brillouin light scattering (BLS) involves interactions between photons and magnons.
- Whispering gallery mode resonators offer enhanced light-matter interactions.
- Magneto-optical effects are crucial for controlling light propagation in magnetic materials.
Purpose of the Study:
- To demonstrate enhanced Brillouin light scattering in magneto-optical whispering gallery mode resonators.
- To achieve efficient coherent optical-to-microwave conversion.
- To understand and control mode-matching conditions for triple resonance.
Main Methods:
- Utilizing magneto-optical whispering gallery mode resonators.
- Tuning resonators to a triple-resonance point for enhanced photon-magnon coupling.
- Identifying and exciting specific optical modes to satisfy mode-matching conditions.
Main Results:
- Demonstrated enhanced Brillouin light scattering of optical photons with magnons.
- Achieved intrinsic single-sideband excitation due to wave vector matching selection rules.
- Showcased strong suppression of one sideband for precise frequency mapping.
Conclusions:
- Triple resonance in magneto-optical whispering gallery resonators enables enhanced BLS.
- Single-sideband excitation is key for one-to-one frequency mapping in optical-to-microwave conversion.
- Precise mode control is essential for advanced photonic and magnonic devices.
