Work

Generation of magnonic frequency combs in a PT -symmetric cavity magnomechanical system

Year: 2026

Type: article

Abstract: Non-Hermitian magnonics, combining non-Hermitian physics and magnonics, has become a significant research topic in magnon spintronics. Here, we investigate the magnonic spectrum in a PT -symmetric cavity magnomechanical system. We find that magnonic frequency combs can be generated when the system is in the PT -symmetric phase. The magnonic frequency comb features an ultralow driving threshold in the blue-detuned regime. And the magnonic frequency comb can be generated in the red-detuned regime, which is difficult to implement in the passive magnomechanical systems. These new features come from the fact that the dissipation of two eigenmodes in the PT -symmetric phase is enormously reduced, which leads to the effective enhancement of the magnomechanical nonlinearity. This work provides a promising route for generating low-power magnonic frequency combs and offers the prospect of exploring PT -symmetric magnonic devices.

Source: Optics Express

DOI: 10.1364/oe.593267

Authors: Bao Wang, Xiao Jia, Xiao-Long Zhang, Shuang Guo, Yunfeng Wang

Language: English

Topic: Mechanical and Optical Resonators

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: National Natural Science Foundation of China, Natural Science Foundation of Henan Province, Nanyang Institute of Technology

Awards: G1722139154, G1937786543, G6930984388, G8262912161