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Magnon-mediated nonreciprocal microwave transmission based on quantum interference
Optics Express
|October 7, 2021
Summary
Researchers demonstrate a novel method for nonreciprocal microwave transmission using superconducting cavities and ferrimagnetic materials. This technique offers tunable light isolation, crucial for advanced signal processing and quantum information applications.
Area of Science:
- Quantum physics
- Solid-state physics
- Microwave engineering
Background:
- Nonreciprocity is essential for applications like signal processing and noise isolation.
- Implementing nonreciprocal devices often requires complex designs.
Purpose of the Study:
- To propose a simple and feasible scheme for nonreciprocal microwave transmission.
- To explore the use of ferrimagnetic materials in superconducting cavities for this purpose.
Main Methods:
- Coupling a magnon mode with two microwave modes in a high-quality-factor superconducting cavity.
- Utilizing quantum interference between transmission paths to break time-reversal symmetry.
- Modulating photon-magnon coupling strength and adjusting a static magnetic field.
Main Results:
- Achieved tunable nonreciprocal microwave transmission.
- Demonstrated high light isolation controllable via magnetic field strength.
- Verified the role of quantum interference and broken time-reversal symmetry.
Conclusions:
- The proposed scheme offers a simple and tunable method for nonreciprocal transmission.
- The results facilitate potential applications in magnetic sensing and coherent information processing.
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