Acoustic-Surface-Wave Isolator

Lewis, M.F.; Patterson, E.

doi:10.1063/1.1654147

Cited by 38 publications

(14 citation statements)

References 8 publications

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“…Already in the 1970's surface acoustic wave insulators were demonstrated by using yttrium iron garnet films on gadolinium gallium garnet. 92 More recently, similar non-reciprocal propagation of surface acoustic waves has also been observed for LiNbO 3 combined with Ni. 93 It turns out that interfacial chiral exchange coupling, the Dzyaloshinskii-Moriya interaction, can shift the hy-bridization gaps relative to each other for the magnonphonon modes with opposite momenta and thus allows to optimize the non-reciprocity.…”

Section: B Magnetomechanics and Magnon-phonon Coupled Devicessupporting

confidence: 56%

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

116

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Quantum technology has made tremendous strides over the past two decades with remarkable advances in materials engineering, circuit design and dynamic operation. In particular, the integration of different quantum modules has benefited from hybrid quantum systems, which provide an important pathway for harnessing the different natural advantages of complementary quantum systems and for engineering new functionalities. This review focuses on the current frontiers with respect to utilizing magnetic excitatons or magnons for novel quantum functionality. Magnons are the fundamental excitations of magnetically ordered solid-state materials and provide great tunability and flexibility for interacting with various quantum modules for integration in diverse quantum systems. The concomitant rich variety of physics and material selections enable exploration of novel quantum phenomena in materials science and engineering. In addition, the relative ease of generating strong coupling and forming hybrid dynamic systems with other excitations makes hybrid magnonics a unique platform for quantum engineering. We start our discussion with circuit-based hybrid magnonic systems, which are coupled with microwave photons and acoustic phonons. Subsequently, we are focusing on the recent progress of magnon-magnon coupling within confined magnetic systems. Next we highlight new opportunities for understanding the interactions between magnons and nitrogen-vacancy centers for quantum sensing and implementing quantum interconnects. Lastly, we focus on the spin excitations and magnon spectra of novel quantum materials investigated with advanced optical characterization.

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Section: B Magnetomechanics and Magnon-phonon Coupled Devicessupporting

confidence: 56%

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Awschalom

et al. 2021

IEEE Trans. Quantum Eng.

116

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“…4(a). = Such nonreciprocity effects are well known and are frequently observed in magnetic systems [34][35][36]. In the following we consider only the antiparallel configuration, where the attenuation peak is slightly larger.…”

Section: A Evidence Of Subgigahertz Resonance and Angle Sensitivity mentioning

confidence: 97%

Surface-Acoustic-Wave Induced Ferromagnetic Resonance in Fe Thin Films and Magnetic Field Sensing

et al. 2019

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Resonant magnetoelastic coupling (MEC) is demonstrated in an Fe thin film epitaxially grown on a piezoelectric GaAs substrate with application of subgigahertz surface acoustic waves (SAWs). The frequency at which resonant MEC is achieved is reduced far below 1 GHz by the application of a small in-plane magnetic field. Moreover, the resonance, observable by attenuation and velocity changes of the SAW, can be switched on and off by a small (0.1 •) angular rotation of this in-plane field. This angular sensitivity makes SAW-ferromagnet devices attractive for sensing applications, such as wireless, batteryfree, and interrogable magnetic-field monitors. Using a simple magnetization dynamics model that takes into account the Fe magnetic anisotropy and the softening of the magnetic precession modes, we are able to describe the observed salient features.

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“…Compared with conventional ferrite-based circulators, strong coupling between magnons and photons will significantly reduce the volume of magnetic materials needed for reaching isolation. We also note the development of surface acoustic wave (SAW) isolators based on magnon-phonon coupling [121][122][123] , where the nonreciprocal effects in magnonics are utilized to create nonreciprocity in SAWs when coupled to magnons. Similar to magnon-photon coupling, strong magnonphonon coupling have also been proposed to produce deep isolation 123 .…”

Section: (G)]mentioning

confidence: 99%

Hybrid magnonics: physics, circuits and applications for coherent information processing

Li,

Zhang,

Tyberkevych

et al. 2020

Preprint

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Hybrid dynamic systems have recently gained interests with respect to both fundamental physics and device applications, particularly with their potential for coherent information processing. In this perspective, we will focus on the recent rapid developments of magnon-based hybrid systems, which seek to combine magnonic excitations with diverse excitations for transformative applications in devices, circuits and information processing. Key to their promising potentials is that magnons are highly tunable excitations and can be easily engineered to couple with various dynamic media and platforms. The capability of reaching strong coupling with many different excitations has positioned magnons well for studying solid-state coherent dynamics and exploiting unique functionality. In addition, with their gigahertz frequency bandwidth and the ease of fabrication and miniaturization, magnonic devices and systems can be conveniently integrated into microwave circuits for mimicking a broad range of device concepts that have been applied in microwave electronics, photonics and quantum information. We will discuss a few potential directions for advancing magnon hybrid systems, including on-chip geometry, novel coherent magnonic functionality, and coherent transduction between different platforms. As future outlook, we will discuss the opportunities and challenges of magnonic hybrid systems for their applications in quantum information and magnonic logic.

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Acoustic-Surface-Wave Isolator

Abstract: A 200-MHz acoustic-surface-wave isolator has been constructed employing an epitaxial layer of Ga-doped YIG on a gadolinium gallium garnet substrate.

Cited by 38 publications

References 8 publications

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Quantum Engineering With Hybrid Magnonic Systems and Materials (Invited Paper)

Surface-Acoustic-Wave Induced Ferromagnetic Resonance in Fe Thin Films and Magnetic Field Sensing

Hybrid magnonics: physics, circuits and applications for coherent information processing

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