Piezoelectric microresonators for sensitive spin detection
arXiv:2405.02212 · doi:10.1103/PhysRevApplied.22.064019
Abstract
Piezoelectric microresonators are indispensable in wireless communications, and underpin radio frequency filtering in mobile phones. These devices are usually analyzed in the quasi-(electro)static regime with the magnetic field effectively ignored. On the other hand, at GHz frequencies and especially in piezoelectric devices exploiting strong dimensional confinement of acoustic fields, the surface magnetic fields () can be significant. This field, which oscillates at GHz frequencies, but is confined to m-scale wavelengths provides a natural route to efficiently interface with nanoscale spin systems. We show through scaling arguments that for tightly focused acoustic fields at a given operation frequency . We demonstrate the existence of these surface magnetic fields in a proof-of-principle experiment by showing excess power absorption at the focus of a surface acoustic wave (SAW), when a polished Yttrium-Iron-Garnet (YIG) sphere is positioned in the evanescent field, and the magnon resonance is tuned across the SAW transmission. Finally, we outline the prospects for sensitive spin detection using small mode volume piezoelectric microresonators, including the feasibility of electrical detection of single spins at cryogenic temperatures.
9 pages, 7 figures (including appendices)
References in corpus (19)
- Circuit cavity electromechanics in the strong coupling regime
- Acoustically driven ferromagnetic resonance
- Strong-field interactions between a nanomagnet and a photonic cavity
- Universal spin-momentum locking of evanescent waves
- Universal Quantum Transducers based on Surface Acoustic Waves
- Probing spin-phonon interactions in silicon carbide with Gaussian acoustics
- Reaching the quantum limit of sensitivity in electron spin resonance
- Coherent Acoustic Control of a Single Silicon Vacancy Spin in Diamond
- Mesoscopic spin confinement during acoustically induced transport
- Single electron-spin-resonance detection by microwave photon counting
- Inductive-detection electron-spin resonance spectroscopy with spins sensitivity
- Storing quantum information in spins and high-sensitivity ESR
- Fano Interference in Microwave Resonator Measurements
- Engineering electron-phonon coupling of quantum defects to a semi-confocal acoustic resonator
- Focusing Surface Acoustic Wave Microcavities on GaAs
- Resonant magnetic induction tomography of a magnetized sphere
- Switching of Magnetic Moments of Nanoparticles by Surface Acoustic Waves
- Low-loss GHz frequency phononic integrated circuits in Gallium Nitride for compact radio-frequency acoustic wave devices
- Phononic-crystal cavity magnomechanics