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Updated: Sep 17, 2025
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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
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Coherent Magnon-Photon Coupling in the Magnetic Semiconductor CrSBr
Jiacheng Tang1, Arjan Singh2, Nicholas J Brennan3
1Department of Chemistry, Cornell University, Ithaca, New York 14850, United States.
Nano Letters
|June 30, 2025
Summary
Researchers coupled antiferromagnetic magnons in CrSBr, a 2D magnet, with microwave photons. This work integrates 2D magnets into superconducting circuits for quantum technologies.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Materials Science
Background:
- Magnon-based hybrid quantum systems are key for quantum interconnects, sensors, and exploring nonlinear magnonics.
- Two-dimensional (2D) van der Waals magnets offer a compact, atomically flat platform for integration into quantum circuits.
- CrSBr, a magnetic semiconductor, exhibits unique spin-exciton, spin-lattice, and magnon-exciton interactions.
Purpose of the Study:
- To demonstrate coherent coupling between antiferromagnetic (AFM) magnons in CrSBr and microwave photons.
- To explore the integration of 2D van der Waals magnets into superconducting microwave circuits.
- To investigate tuning magnon-photon coupling strength via flake integration.
Main Methods:
- Utilized niobium (Nb)-based on-chip microwave photon resonators.
- Integrated exfoliated CrSBr flakes into the microwave resonators.
- Investigated coupling by varying the number of CrSBr flakes.
Main Results:
- Achieved coherent coupling between AFM magnons in CrSBr and microwave photons.
- Demonstrated tunability of magnon-photon coupling strength by adjusting the number of CrSBr flakes.
- Established a foundational step for integrating 2D magnets into superconducting circuits.
Conclusions:
- Coherent magnon-photon coupling in CrSBr integrated with superconducting resonators is demonstrated.
- This integration opens avenues for advanced quantum devices and fundamental studies.
- The system allows for both microwave and optical probing for comprehensive analysis.
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