Magneto-optical coupling in whispering-gallery-mode resonators

Haigh, J. A.; Langenfeld, Stefan; Lambert, Nicholas J.; Baumberg, Jeremy J.; Ramsay, Andrew J.; Nunnenkamp, Andreas; Ferguson, A. J.

doi:10.1103/physreva.92.063845

Cited by 125 publications

(107 citation statements)

References 32 publications

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“…The mechanism behind the optomagnonic coupling is the Faraday effect, where the angle of polarization of the light changes as it propagates through a magnetic material. Very recent first experiments in this regime show that this is a promising route, by demonstrating coupling between optical modes and magnons, and advances in this field are expected to develop rapidly [23][24][25][26][27]. models.…”

Section: Introductionmentioning

confidence: 99%

Coupled spin-light dynamics in cavity optomagnonics

Kusminskiy¹,

2016

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Experiments during the past two years have shown strong resonant photon-magnon coupling in microwave cavities, while coupling in the optical regime was demonstrated very recently for the first time. Unlike with microwaves, the coupling in optical cavities is parametric, akin to optomechanical systems. This line of research promises to evolve into a new field of optomagnonics, aimed at the coherent manipulation of elementary magnetic excitations by optical means. In this work we derive the microscopic optomagnonic Hamiltonian. In the linear regime the system reduces to the well-known optomechanical case, with remarkably large coupling. Going beyond that, we study the optically induced nonlinear classical dynamics of a macrospin. In the fast cavity regime we obtain an effective equation of motion for the spin and show that the light field induces a dissipative term reminiscent of Gilbert damping. The induced dissipation coefficient however can change sign on the Bloch sphere, giving rise to self-sustained oscillations. When the full dynamics of the system is considered, the system can enter a chaotic regime by successive period doubling of the oscillations.

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Section: Introductionmentioning

confidence: 99%

Coupled spin-light dynamics in cavity optomagnonics

Kusminskiy¹,

2016

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“…Several numerical and approximate analytic techniques have been developed to study the properties of WGMs in the presence of local dielectric or plasmonic perturbations [32][33][34][35] and to model cavitywaveguide coupling [36][37][38][39][40]. To date, however, limited consideration has been given to birefringent resonators or couplers which are attracting increasing attention, especially in nonlinear optics [12,41]. In this work, we present a detailed theoretical formalism describing dielectric frequency tuning of WGM resonances using planar substrates, in addition to quantifying substrate induced line width changes .…”

Section: Introductionmentioning

confidence: 99%

Dielectric tuning and coupling of whispering gallery modes using an anisotropic prism

et al. 2016

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“…In both cases, knowledge of the wave's amplitude distribution inside a structure is crucial for their interaction [30][31].…”

Section: Discussionmentioning

confidence: 99%

Confined states in photonic-magnonic crystals with complex unit cell

Dadoenkova

Lyubchanskii

Kłos

et al. 2016

Journal of Applied Physics

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We have investigated multifunctional periodic structures in which electromagnetic waves and spin waves can be confined in the same areas. Such simultaneous localization of both sorts of excitations can potentially enhance the interaction between electromagnetic waves and spin waves. The system we considered has a form of one dimensional photonic-magnonic crystal with two types of magnetic layers (thicker and thinner ones) separated by sections of the dielectric photonic crystals. We focused on the electromagnetic defect modes localized in the magnetic layers (areas where spin waves can be exited) and decaying in the sections of conventional (nonmagnetic) photonic crystals. We showed how the change of relative thickness of two types of the magnetic layers can influence on the spectrum of spin waves and electromagnetic defect modes, both localized in magnetic parts of the system.

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Magneto-optical coupling in whispering-gallery-mode resonators

Cited by 125 publications

References 32 publications

Coupled spin-light dynamics in cavity optomagnonics

Coupled spin-light dynamics in cavity optomagnonics

Dielectric tuning and coupling of whispering gallery modes using an anisotropic prism

Confined states in photonic-magnonic crystals with complex unit cell

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