Voltage control of cavity magnon polariton

Kaur, Sukhvinder; Yao, Bing; Rao, J. W.; Gui, Y. S.; Hu, C.‐M.

doi:10.1063/1.4959140

Cited by 39 publications

(24 citation statements)

References 17 publications

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“…In order to elucidate the underlying physics of the observed high-gain strong anti-crossing effect from the ISSR-YIG hybrid sample, we considered the degrees of co-operativity of different resonance systems in the field of quantum information. Three different models have been proposed: coupled harmonic oscillators 10 , 20 , 21 , dynamic phase correlation 10 , 29 , and microscopy theory 28 , 33 . Here, we adapted the harmonic oscillator model, as it can quantitatively describe the experimentally observed modes in coupled systems and also can easily be generalized for a multi-mode coupling system.…”

Section: Resultsmentioning

confidence: 99%

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Robust magnon-photon coupling in a planar-geometry hybrid of inverted split-ring resonator and YIG film

Bhoi

Kim

et al. 2017

Sci Rep

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We experimentally demonstrate strongly enhanced coupling between excited magnons in an Yttrium Iron Garnet (YIG) film and microwave photons in an inverted pattern of split-ring resonator (noted as ISRR). The anti-crossing effects of the ISRR’s photon mode and the YIG’s magnon modes were found from |S21|-versus-frequency measurements for different strengths and directions of externally applied magnetic fields. The spin-number-normalized coupling strength (i.e. single spin-photon coupling) was determined to 0.194 Hz ( = 90 MHz) at 3.7 GHz frequency. Furthermore, we found that additional fine features in the anti-crossing region originate from the excitation of different spin-wave modes (such as the magnetostatic surface and the backward-volume magnetostatic spin-waves) rather than the Kittel-type mode. These spin-wave modes, as coupled with the ISRR mode, modify the anti-crossing effect as well as their coupling strength. An equivalent circuit model very accurately reproduced the observed anti-crossing effect and its coupling strength variation with the magnetic field direction in the planar-geometry ISRR/YIG hybrid system. This work paves the way for the design of new types of high-gain magnon-photon coupling systems in planar geometry.

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Section: Resultsmentioning

confidence: 99%

“…( 1 ) corresponds to the coupling strength. This coupling strength is measured in the frequency unit that defines the coupling range within which energy can be transferred between the interacting modes of coupled systems 20 , 21 , 23 .…”

Section: Resultsmentioning

confidence: 99%

Robust magnon-photon coupling in a planar-geometry hybrid of inverted split-ring resonator and YIG film

Bhoi

Kim

et al. 2017

Sci Rep

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“…The classical description of the CMP has been used to successfully described important experimental results such as non-local spin current manipulation [50] and on-chip CMP control [109]. However properly engineered experimental systems are also pushing the quantum frontiers of the CMP through the use of cooperative polariton dynamics [75] or the introduction of inherently quantum systems [74].…”

Section: A Quantum Approachmentioning

confidence: 99%

“…Furthermore, a transition from microwave to optical frequencies has recently resulted in the exploration of cavity optomagnonics [65][66][67][68][69][70]. On the more applied side, voltage control of the CMP using on-chip devices [71], the observation of electromagnetically induced transparency [38,72], novel quantum information architectures employing magnon dark modes [59], and the realization of microwave to optical frequency conversion [73] all point to a bright future for CMP based devices.…”

Section: Introductionmentioning

confidence: 99%

Cavity Spintronics: An Early Review of Recent Progress in the Study of Magnon–Photon Level Repulsion

Harder

2018

Solid State Physics

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Light-matter interactions lie at the heart of condensed matter physics, providing physical insight into material behaviour while enabling the design of new devices. Perhaps this is most evident in the push to develop quantum information and spintronic technologies. On the side of quantum information, engineered lightmatter interactions offer a powerful means to access and control quantum states, while at the same time new insights into spin-photon manipulation will benefit the development of spintronic technologies. In this context the recent discovery of hybridization between ferromagnets and cavity photons has ushered in a new era of light-matter exploration at the crossroads of quantum information and spintronics. The key player in this rapidly developing field of cavity spintronics is a quasiparticle, the cavity-magnon-polariton. In this early review of recent work the fundamental behaviour of the cavity-magnon-polariton is summarized and related to the development of new spintronic applications. In the last few years a comprehensive theoretical framework of spin-photon hybridization has been developed. On an intuitive level many features can be described by a universal model of coupled oscillators, however the true origin of hybridization is only revealed by considering a more comprehensive electrodynamic framework. Here both approaches are summarized and an outline of a quantum description through the input-output formalism is provided. Based on this foundation, in depth experimental investigations of the coupled spin-photon system have been performed. For example, it has been found that hybridization will influence spin current generated through the spin pumping mechanism, demonstrating a firm link between spin-photon coupling and spintronics. Furthermore several in-situ coupling control mechanisms, which offer both physical insight and a means to develop cavityspintronic technologies, have been revealed. The many recent developments within this field represent only the first steps in what appears to be a bright future for cavity spintronics. Hopefully this early review will introduce new explorers to this exciting frontier of condensed matter research, lying at the crossroads of magnetism and cavity quantum electrodynamics.

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“…In addition, the optimisation of the coupling conditions has been shown to be a vital aspect of obtaining non-Markovian dynamics in a multi magnet-cavity hybrid system employed as a coherent, long-lifetime, broadband and multimode gradient memory with a 100-ns storage [10]. Mechanisms to control the coupling strength have so far included changing the position of the sample within the resonator [16], voltage induced control [17], as well as varying the tem-perature of the system [18]. More recently, a two-port cavity approach has been implemented using two- [19,20] and three-dimensional [21,22] systems as a way to achieve level attraction as well as coherent manipulation of energy exchange in the time domain [23].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Approach to Cavity Spintronics

et al. 2021

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The fields of cavity quantum electrodynamics and magnetism have recently merged into 'cavity spintronics', investigating a quasiparticle that emerges from the strong coupling between standing electromagnetic waves confined in a microwave cavity resonator and the quanta of spin waves, magnons. This phenomenon is now expected to be employed in a variety of devices for applications ranging from quantum communication to dark matter detection. To be successful, most of these applications require a vast control of the coupling strength, resulting in intensive e↵orts to understanding coupling by a variety of di↵erent approaches. Here, the electromagnetic properties of both resonator and magnetic samples are investigated to provide a comprehensive understanding of the coupling between these two systems. Because the coupling is a consequence of the excitation vector fields, which directly interact with magnetisation dynamics, a highly-accurate electromagnetic perturbation theory is employed which predicts the resonant hybrid mode frequencies for any field configuration within the cavity resonator. The coupling is shown to be strongly dependent not only on the excitation vector fields and sample's magnetic properties but also on the sample's shape. These findings are illustrated by applying the theoretical framework to two distinct experiments: a magnetic sphere placed in a three-dimensional resonator, and a rectangular, magnetic prism placed on a two-dimensional resonator. The theory provides comprehensive understanding of the overall behaviour of strongly coupled systems and it can be easily modified for a variety of other systems.

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Voltage control of cavity magnon polariton

Cited by 39 publications

References 17 publications

Robust magnon-photon coupling in a planar-geometry hybrid of inverted split-ring resonator and YIG film

Robust magnon-photon coupling in a planar-geometry hybrid of inverted split-ring resonator and YIG film

Cavity Spintronics: An Early Review of Recent Progress in the Study of Magnon–Photon Level Repulsion

Electromagnetic Approach to Cavity Spintronics

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