Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers

Maksymov, Ivan S.; Hutomo, Jessica; Nam, Donghee; Kostylev, Mikhail

doi:10.1063/1.4921535

Cited by 12 publications

(11 citation statements)

References 66 publications

(132 reference statements)

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“…A effectively onedimensional system of a thin film with in-plane magnetization in a planar cavity was solved exactly in the linear regime, exposing, for example, strong coupling to standing spin waves. Maksymov et al [28] carried out a numerical study of the strong-coupling regime in all-dielectric magnetic multilayers that resonantly enhance the microwave magnetic field. A quantum theory of strong coupling for nanoscale magnetic spheres in microwave resonators has been developed in the macrospin approximation [29], but this regime has not yet been reached in experiments.…”

Section: Introductionmentioning

confidence: 99%

Magnetic spheres in microwave cavities

2015

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We apply Mie scattering theory to study the interaction of magnetic spheres with microwaves in cavities beyond the magnetostatic and rotating wave approximations. We demonstrate that both strong and ultrastrong coupling can be realized for stand alone magnetic spheres made from yttrium iron garnet (YIG), acting as an efficient microwave antenna. The eigenmodes of YIG spheres with radii of the order mm display distinct higher angular momentum character that has been observed in experiments.

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Section: Introductionmentioning

confidence: 99%

Magnetic spheres in microwave cavities

2015

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“…As for the spin ensemble, we choose a magnon resonance of an Yttrium iron garnet (Y 3 Fe 5 O 12 or YIG) [23]. These ferrimagnetic systems recently became a popular subject of study [24][25][26][27][28], as they provide high coupling strengths and low spin losses due to high concentration and ordering of Fe ions and low coupling to phonon modes. In this work, we use single crystal YIG spheres, which have also drawn considerable attention [18,[29][30][31][32].…”

mentioning

confidence: 99%

Superstrong coupling of a microwave cavity to yttrium iron garnet magnons

Kostylev

Goryachev

Tobar

2016

Applied Physics Letters

161

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Multiple-post reentrant 3D lumped cavity modes have been realized to design the concept of discrete Whispering Gallery and Fabry-Pérot-like Modes for multimode microwave Quantum Electrodynamics experiments. Using a magnon spin-wave resonance of a submillimeter-sized Yttrium-IronGarnet sphere at milliKelvin temperatures and a four-post cavity, we demonstrate the ultra-strong coupling regime between discrete Whispering Gallery Modes and a magnon resonance with strength of 1.84 GHz. By increasing the number of posts to eight and arranging them in a D4 symmetry pattern, we expand the mode structure to that of a discrete Fabry-Pérot cavity and modify the Free Spectral Range (FSR). We reach the superstrong coupling regime, where spin-photon coupling strength is larger than FSR, with coupling strength in the 1.1 to 1.5 GHz range.Cavity Quantum Electrodynamics (QED) is a conceptual paradigm dealing with light-matter interaction at the quantum level that has been investigated in a number of various systems. There is a broad range of various problems that have to be solved by cavity QED including generation of nonclassical states[1], quantum memory [2], quantum frequency conversion [3,4], etc. For many of these applications, it is important to combine advantages of different approaches to QED in a Hybrid Quantum System (HQS) [5,6]. For example, combination of nonlinear properties of superconducting circuits based on Josephson Junction and large electron [7] or nuclearspin[8] ensembles can be used for new quantum protocols without single spin manipulation and is investigated in many physical implementations [9][10][11][12][13].In the process of HQS design, it is vital to be able to engineer photon modes by continuous adjustment of system parameters without reinventing a new cavity. It is important to have a single platform that can provide a broad range of spectra required for each particular purpose. Moreover, in order to achieve strong coupling with other elements of HQS, such a platform should guarantee reconfigurable high space localisation of both electrical and magnetic fields to achieve sufficient filling factors. Finally, such cavities are required to be adjustable in-situ in the wide range preferably at high speed rate. These features are lacking for traditional 3D cavities such as box resonators and microwave Whispering Gallery Mode resonators. Having only one or two free parameters to control, these platforms can be hard to modify for a particular set of requirements in terms of field patterns, spectra and tunability without significant change of their structure.All the described requirements are met by constructing designs based on the recently proposed multi-post reentrant cavity [14,15] that is based on a known 3D closed resonator with a central post gap [16,17]. For this platform, it has been demonstrated that by an a priori rearrangement of the post, one can easily engineer the device resonance frequencies and field patterns to achieve high frequency and space localisation [14] that guarantees strong coupli...

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“…50 µm). This deep subwavelength, with respect to microwave wavelengths, feature enables a strong, ∼ 350fold magnetic field intensity enhancement inside the YIG film 60 . Together with a strong spatial overlap between the photon and magnon modes, this enhancement greatly facilitates the anti-crossing between the microwave photon and FMR magnon modes 5%, where f 0 1 is the resonance frequency of the electromagnetic fundamental mode of the whole dielectric-YIG-dielectric structure at H = 0, which is a signature of the strong coupling regime 17 .…”

Section: Yig Dielectric Antennas and Microwave Magnetic Field Enhamentioning

confidence: 94%

“…An YIG film can be placed in the gap of the waveguide antenna to achieve a strong hybridisation of magnons with microwave resonance modes 60 . In this case, the thickness of the gap is equal to the film thickness (e.g.…”

Section: Yig Dielectric Antennas and Microwave Magnetic Field Enhamentioning

confidence: 99%

Perspective: Strong microwave photon-magnon coupling in multiresonant dielectric antennas

Maksymov

2018

Journal of Applied Physics

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Achieving quantum-level control over electromagnetic waves, magnetisation dynamics, vibrations and heat is invaluable for many practical application and possible by exploiting the strong radiation-matter coupling. Most of the modern strong microwave photon-magnon coupling developments rely on the integration of metal-based microwave resonators with a magnetic material. However, it has recently been realised that all-dielectric resonators made of or containing magneto-insulating materials can operate as a standalone strongly-coupled system characterised by low dissipation losses and strong local microwave field enhancement. Here, after a brief overview of recent developments in the field, I discuss examples of such dielectric resonant systems and demonstrate their ability to operate as multiresonant antennas for light, microwaves, magnons, sound, vibrations and heat. This multiphysics behaviour opens up novel opportunities for the realisation of multiresonant coupling such as, for example, photon-magnon-phonon coupling. I also propose several novel systems in which strong photon-magnon coupling in dielectric antennas and similar structures is expected to extend the capability of existing devices or may provide an entirely new functionality. Examples of such systems include novel magnetofluidic devices, high-power microwave power generators, and hybrid devices exploiting the unique properties of electrical solitons.

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Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers

Cited by 12 publications

References 66 publications

Magnetic spheres in microwave cavities

Magnetic spheres in microwave cavities

Superstrong coupling of a microwave cavity to yttrium iron garnet magnons

Perspective: Strong microwave photon-magnon coupling in multiresonant dielectric antennas

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