A5053260078- Mechanical and Optical Resonators
- Quantum and electron transport phenomena
- Magnetic properties of thin films
- Photonic and Optical Devices
- Atomic and Subatomic Physics Research
- Neural Networks and Reservoir Computing
- Magneto-Optical Properties and Applications
- Quantum Information and Cryptography
- Physics of Superconductivity and Magnetism
- Diamond and Carbon-based Materials Research
- Orbital Angular Momentum in Optics
- Advanced Fiber Optic Sensors
- Advanced Optical Sensing Technologies
- Semiconductor Quantum Structures and Devices
- Geophysical and Geoelectrical Methods
- Quantum optics and atomic interactions
- ZnO doping and properties
- Topological Materials and Phenomena
- High-pressure geophysics and materials
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Advanced Materials Characterization Techniques
- nanoparticles nucleation surface interactions
- Semiconductor materials and interfaces
- Thermodynamic and Structural Properties of Metals and Alloys
École Normale Supérieure - PSL
2024-2025
Laboratoire de Physique de l'ENS
2024-2025
Sorbonne Université
2024-2025
Université Paris Sciences et Lettres
2024-2025
RWTH Aachen University
2023-2024
Laboratoire de Physique de l'ENS de Lyon
2024
École Normale Supérieure
2024
Université Paris Cité
2024
Max Planck Institute for the Science of Light
2021-2023
Delft University of Technology
2017-2020
Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in GHz-to-THz frequency range, utilization nonlinear nonreciprocal phenomena, compatibility with CMOS are just a few many advantages offered by magnons. Although magnonics is still primarily positioned academic domain, scientific technological challenges field being extensively investigated, proof-of-concept prototypes have already been realized...
Inelastic scattering of light by spin waves generates an energy flow between the and magnetization fields, a process that can be enhanced controlled concentrating in magneto-optical resonators. Here, we model cooling sphere made magnetic insulator, such as yttrium iron garnet, using monochromatic laser source. When magnon lifetimes are much larger than optical ones, treat latter Markovian bath for magnons. The steady-state magnons canonically distributed with temperature is intensity. We...
Brillouin light scattering is an established technique to study magnons, the elementary excitations of a magnet. Its efficiency can be enhanced by cavities that concentrate intensity. Here, we theoretically inelastic photons magnetic sphere supports optical whispering gallery modes in plane normal magnetization. Magnons with low angular momenta scatter forward direction pronounced asymmetry Stokes and anti-Stokes strength, consistent earlier studies. large constitute Damon Eschbach are shown...
Generating non-classical states in macroscopic systems is a long standing challenge. A promising platform the context of this quest are novel hybrid based on magnetic dielectrics, where photons can couple strongly and coherently to excitations, although state therein yet be observed. We propose scheme generate magnetization cat state, i.e. quantum superposition two distinct directions, using conventional setup ferromagnet microwave cavity. Our uses ground an ellipsoid shaped magnet, which...
The optical manipulation of magnon states in antiferromagnets (AFMs) holds significant potential for advancing AFM-based computing devices. In particular, two-magnon Raman scattering processes are known to generate entangled magnon-pairs with opposite momenta. We propose harness the dynamical backaction a driven cavity coupled these processes, obtain steady squeezed magnon-pairs, represented by Perelomov coherent states. system's dynamics can be controlled strength and detuning drive losses....
We experimentally identify the magnetostatic modes active for Brillouin light scattering in optical whispering gallery of a yttrium iron garnet sphere. Each mode is identified by magnetic field dispersion ferromagnetic-resonance spectroscopy and coupling strength to known distribution microwave drive antenna. Our measurements confirm recent predictions that higher-order can also generate scattering, according selection rules derived from axial symmetry. From this we summarize scattering....
Inelastic scattering of photons is a promising technique to manipulate magnons but it suffers from weak intrinsic coupling. We theoretically discuss an idea increase optomagnonic coupling in optical whispering gallery mode cavities, by generalizing previous analysis include the exchange interaction. predict that constant surface yttrium iron garnet (YIG) spheres with radius $300\,\mathrm{\mu}$m can be up $40$ times larger than macrospin Kittel mode. Whereas this enhancement falls short...
We report strong chiral coupling between magnons and photons in microwave waveguides that contain chains of small magnets on special lines. Large magnon accumulations at one edge the chain emerge when exciting by a phased antenna array. This mechanism holds promise new functionalities nonlinear quantum magnonics.
Quantum magnonics, an emerging field focusing on the study of magnons for quantum applications, requires precise measurement methods capable resolving single magnons.Existing techniques introduce additional dissipation channels and are not apt magnets in free space.Brillouin light scattering (BLS) is a well-established technique probing magnetization known its high sensitivity temporal resolution.The coupling between photons controlled by laser input, so it can be switched off when needed.In...
Dissipative coupling can generate non-Hermitian states of matter with interesting characteristics as, for instance, subradiant long lifetimes and novel topological phases. Here, the authors show that magnons photons interact in a chiral fashion, whereby distant magnets are dissipatively nonreciprocally coupled waveguides range. Theyformulate basic theory magnon one to many via waveguide emphasize emerging physics, involvingunidirectional pumping superradiant edge chains support large accumulations.
We put forward the concept of an optomagnonic crystal: a periodically patterned structure at microscale based on magnetic dielectric, which can co-localize magnon and photon modes. The co-localization in small volumes result large values photon-magnon coupling single quanta level, opens perspectives for quantum information processing conversion schemes with these systems. study theoretically simple geometry consisting one-dimensional array holes abrupt defect, considering ferrimagnet Yttrium...
We propose a new mechanism and related device concept for robust, magnetic field tunable radio-frequency (rf) oscillator using the self oscillation of domain wall subject to uniform static spatially non-uniform vertical dc spin current. The is created as it translates periodically between two unstable positions, one being in region where both current are present, other, only present. pushes away from position while other. show that such oscillations stable under noise can exhibit quality...
Abstract We propose and numerically evaluate a protocol to generate an arbitrary quantum state of the magnetization in magnet. The involves repeatedly exciting frequency-tunable superconducting transmon transferring excitations magnet via microwave cavity. To avoid decay, must be much shorter than magnon lifetime. Speeding up by simply shortening pulses leads non-resonant leakage higher levels accompanied decoherence. discuss how correct for such leakages applying counter de-excite these...
Abstract To use batteries as large-scale energy storage systems it is necessary to measure and understand their degradation in-situ in-operando . As a battery’s often the result of molecular processes inside electrolyte, sensing platform which allows ions with high spatial resolution needed. Primary candidates for such are NV-centers in diamonds. We propose single NV-center deduce electric field distribution generated by electrolyte through microwave pulse sequences. show that can be...
The chirality of magnetostatic Damon-Eshbach (DE) magnons affects the transport energy and angular momentum at surface magnetic films spheres. We calculate surface-disorder-limited dephasing lifetimes modes sufficiently thick high-quality ferromagnetic such as yttrium iron garnet. Surface are not protected by chirality, but interact strongly with smooth roughness. Nevertheless, for long-range disorder, is much less affected suppressed backscattering (vertex correction). Moreover, in presence...
We propose to excite a large number of coherent magnons with high momentum in optical cavities. This is achieved by two counterpropagating modes that are detuned the frequency selected magnon, similar stimulated Raman scattering. In sub-mm size yttrium iron garnet spheres, mW laser input power generates 10^6-10^8 magnons. The magnon population enhances Brillouin light scattering, probe suitable access their quantum properties.
Magnonics is a field of science that addresses the physical properties spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operations in GHz-to-THz frequency range, utilization nonlinear nonreciprocal phenomena, compatibility with CMOS are just few many advantages offered by magnons. Although magnonics still primarily positioned academic domain, scientific technological challenges being extensively investigated, proof-of-concept prototypes have already...
We propose a platform that combines the fields of cavity optomagnonics and levitated optomechanics to control probe coupled spin-mechanics magnetic dielectric particles. theoretically study dynamics Faraday-active microsphere serving as an optomagnonic cavity, placed in external field driven by laser. find optically magnetization induces angular oscillations particle with low associated damping. Further, we show motion can be probed via power spectrum outgoing light. Namely, characteristic...
We propose a hybrid quantum system consisting of magnetic particle inductively coupled to two superconducting transmon qubits, where qubit-qubit interactions are mediated via magnons. show that the can be tuned into three different regimes effective interactions, namely transverse ($XX + YY$), longitudinal ($ZZ$) and non-trivial $ZX$ interaction. In addition, we an enhanced coupling achieved by employing ellipsoidal magnet, carrying anisotropic fluctuations. scheme for realizing two-qubit...
We propose and numerically evaluate a protocol to generate an arbitrary quantum state of the magnetization in magnet. The involves repeatedly exciting frequency-tunable superconducting transmon transferring excitations magnet via microwave cavity. To avoid decay, must be much shorter than magnon lifetime. Speeding up by simply shortening pulses leads non-resonant leakage higher levels accompanied decoherence. discuss how correct for such leakages applying counter de-excite these levels. In...