A5068847768- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Quantum and electron transport phenomena
- Magnetic properties of thin films
- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Quantum Mechanics and Non-Hermitian Physics
- Strong Light-Matter Interactions
- Magneto-Optical Properties and Applications
- Neural Networks and Reservoir Computing
- Geophysics and Sensor Technology
- Advanced Fiber Laser Technologies
- Physics of Superconductivity and Magnetism
- Perovskite Materials and Applications
- Metamaterials and Metasurfaces Applications
- Topological Materials and Phenomena
- Nonlinear Photonic Systems
- Acoustic Wave Resonator Technologies
- 2D Materials and Applications
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Applications
- Plant Virus Research Studies
- Metallic Glasses and Amorphous Alloys
- Microwave and Dielectric Measurement Techniques
- Terahertz technology and applications
Shandong University
2024-2025
State Key Laboratory of Crystal Materials
2025
ShanghaiTech University
2022-2024
University of Manitoba
2016-2023
Lanzhou University
2014-2021
Chinese Academy of Sciences
2018
Tongji University
2015
Institute of Solid State Physics
2015
We reveal the cooperative effect of coherent and dissipative magnon-photon couplings in an open cavity magnonic system, which leads to nonreciprocity with a considerably large isolation ratio flexible controllability. Furthermore, we discover unidirectional invisibility for microwave propagation, appears at zero-damping condition hybrid modes. A simple model is developed capture generic physics interference between couplings, accurately reproduces observations over broad range parameters....
We report dissipative magnon-photon coupling caused by cavity Lenz effect, where the magnons in a magnet induce rf current cavity, leading to back action that impedes magnetization dynamics. This effect is revealed our experiment as level attraction with coalescence of hybridized modes, which distinctly different from repulsion mode anticrossing coherent coupling. develop method control in- terpolation and coupling, observe matching condition two effects cancel. Our work sheds light on...
By engineering an anti-parity-time (anti-PT) symmetric cavity magnonics system with precise eigenspace controllability, we observe two different singularities in the same system. One type of singularity, exceptional point (EP), is produced by tuning magnon damping. Between EPs, maximal coherent superposition photon and states robustly sustained preserved anti-PT symmetry. The other arising from dissipative coupling antiresonances, unconventional bound state continuum (BIC). At settings BICs,...
Abstract Magnonics is a research field that has gained an increasing interest in both the fundamental and applied sciences recent years. This aims to explore functionalize collective spin excitations magnetically ordered materials for modern information technologies, sensing applications advanced computational schemes. Spin waves, also known as magnons, carry angular momenta allow transmission, storage processing of without moving charges. In integrated circuits, magnons enable on-chip data...
We investigate long-range coherent and dissipative coupling between two spatially separated magnets while both are coupled to a microwave cavity. A careful examination of the system shows that indirect interaction magnon modes is dependent on their individual mechanisms direct If share same form cavity (either or dissipative), then them will produce level repulsion. Conversely, if have different forms (one one attraction. further demonstrate cavity-mediate nature through investigating...
We observe a power-dependent anticrossing of Walker spin-wave modes under microwave pumping when ferrimagnet is placed in waveguide that does not support any discrete photon mode. interpret this unexpected as the generation pump-induced magnon mode couples strongly to ferrimagnet. This inherits an excellent tunability from pump, which allows us control via pump power, frequency, and waveform. Further, we realize remarkable functionality anticrossing, namely, frequency comb, terms nonlinear...
By developing a gain-embedded cavity magnonics platform, we create gain-driven polariton (GDP) that is activated by an amplified electromagnetic field. Distinct effects of light-matter interaction, such as auto-oscillations, phase singularity, self-selection bright mode, and gain-induced magnon-photon synchronization, are theoretically studied experimentally manifested. Utilizing the gain-sustained photon coherence GDP, demonstrate polariton-based coherent microwave amplification (∼40 dB)...
A resistive coupling circuit is used to model the recently discovered dissipative in a hybridized cavity photon-magnon system. With this as basis we have designed planar which controllable transition between level attraction and repulsion can be achieved. This behaviour quantitatively understood using an LCR with complex strength. Our work therefore develops verifies method confirms universality of The realization both coherent couplings may provide new avenues for design adaptation...
Abstract Cavity magnon polaritons are mixed quasiparticles that arise from the strong coupling between cavity photons and quantized magnons. Combining high-speed with long-coherence-time magnons, such promise to be a potential candidate for quantum information processing. For harnessing coherent contained in spatially distributed polariton states, it is highly desirable manipulate two-dimensional system. Here, we demonstrate tunable transport can achieved by strongly magnons microwave...
We experimentally realize a meterscale strong coupling effect between magnons and photons at room temperature, with coherent of $\ensuremath{\sim}20\text{ }\text{ }\mathrm{m}$ dissipative $\ensuremath{\sim}7.6\text{ }\mathrm{m}$. To this end, we integrate saturable gain into microwave cavity then couple active to magnon mode via long coaxial cable. The compensates for the dissipation, but preserves radiation that mediates indirect photon-magnon coupling. It thus enables long-range With full...
Abstract The emerging field of cavity spintronics utilizes the magnon polariton (CMP) induced by Rabi oscillations. In contrast to a single-spin quantum system, such cooperative spin dynamics in linear regime is governed classical physics harmonic oscillators. It makes frequency independent photon Fock state occupation, and thereby restricts application CMP. Here we show that feedback architecture breaks harmonic-oscillator restriction. By increasing number, observe an increase frequency,...
Abstract We report on coherent and dissipative coupling between a magnon mode an anti-resonance of transmission in cylindrical microwave cavity. By effectively suppressing coupling, we observe the hybridized dispersion to change from level repulsion attraction. A careful examination reveals distinct differences line shape phase evolution spectra these behaviors. For quantitative understanding interactions cavity anti-resonance, develop model which precisely describes our experimental...
Abstract The perfect absorption of electromagnetic waves has promoted many applications, including photovoltaics, radar cloaking, and molecular detection. Unlike conventional methods critical coupling that require asymmetric boundaries or coherent multiple incident beams, here we demonstrate single-beam in an on-chip cavity magnonic device without breaking its boundary symmetry. By exploiting magnon-mediated interference between two internal channels, both reflection transmission our can be...
We systematically study the indirect interaction between a magnon mode and cavity photon mediated by traveling photons of waveguide. From general Hamiltonian, we derive effective coupling strength two separated modes, obtain theoretical expression system's transmission. Accordingly, design an experimental setup consisting shield mode, microstrip line, system to test our predictions. measured transmission spectra, interaction, as well hybridization, modes can be observed. All observations...
Recent works in metamaterials and transformation optics have demonstrated exotic properties a number of open systems, including perfect absorption/transmission, electromagnetically induced transparency, cloaking or invisibility, etc. Meanwhile, non-Hermitian physics framework has been developed to describe the however, most related this focus on eigenstate with less attention paid reflection characteristics complex frequency plane, despite usefulness zero-reflection (ZR) for applications....
In this letter, spin rectification was used to study the electric field controlled dynamic magnetic properties of multiferroic composite which is a Co stripe with induced in-plane anisotropy deposited onto Pb(Mg1∕3Nb2∕3)O3-PbTiO3 substrate. Due coupling between piezoelectric and magnetoelastic effects, reversible switching has been realized by varying history applied field. This merit results from hysteresis polarization in nonlinear regime, proved butterfly type dependence Moreover,...
We have experimentally investigated the microwave transmission of cavity-magnon-polariton (CMP) generated by integrating a low damping magnetic insulator onto 2D cavity. The high tunability our planar cavity allows resonance frequency to be precisely controlled using DC voltage. By appropriately tuning voltage and bias, we can observe photon magnon coupling between magnetostatic mode CMP. dispersion CMP was measured either field or applied This electrical control may open up avenues for...
When designing a metamaterial, to obtain excellent resonance characteristics the dissipative loss of subcomponents usually should be minimized. However, this study takes opposite approach and harnesses dissipation. In such non-Hermitian bound state in continuum (BIC) with an infinite $Q$-factor is observed, extremely steep transition from complete extinction nearly perfect transmission achieved narrow band. By repurposing dissipation as coupling mechanism, metamaterials open avenues for...
Abstract Reservoir computing, distinguished by its reduced training overhead compared to traditional recurrent neural networks, emerges as a proficient architecture for networks. Here, an innovative reservoir computing (RC) paradigm based on cavity magnonics speech recognition task is demonstrated, which leverages the high tunability, low energy consumption, and fast response of magnon polaritons (CMPs). The audio signal filtered into pulse train then input CMP device rapidly alter nonlinear...
In van der Waals antiferromagnets, both magnetization and interlayer interactions are temperature dependent, their combined effects significantly impact magnon dispersion. However, these remain largely unexplored. Here, we report the distinct dependencies of optical acoustic modes in a <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:msub><a:mi>CrCl</a:mi><a:mn>3</a:mn></a:msub></a:math> sample. We find that, below <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mi...
Interference between coherent and dissipative coupling results in nonreciprocity cavity magnonic devices, which the isolation ratio can theoretically be infinite when magnon-mode frequency exactly matches a zero-damping condition (ZDC). In order to obtain nonreciprocal device possessing both high broad operating bandwidth, we tune side ZDCs by integrating movable loop antenna, effectively control radiation damping of magnon mode. As consequence, effective bandwidth giant broadened few...
We realize the electromagnetic regulation of nonreciprocal microwave transmission by introducing a pump-induced magnon mode (PIM) into cavity magnonic device with dissipative photon–magnon coupling. As peculiar spin wave, PIM's dynamic properties, including its number and resonant frequency, can be easily tuned pump. Hence, it facilitates precise control coupling process between PIM regulating pump signal. Along these manipulations, produced is regulated without reconfiguring system. In...
We demonstrate the nonreciprocal transmission of magnonic frequency combs (MFCs) in a dissipative cavity-magnonic system. utilize recently emerged pump-induced magnon (PIM) mode YIG spheres to generate an MFC, as PIM exhibits excellent nonlinearity under coherent pumping. Meanwhile, cavity device is prepared critical bound states continuum (BIC), providing clear nonreciprocity. Based on different absorption efficiencies two opposite directions, we have demonstrated difference number comb...