Photomagnonic nanocavities for strong light–spin-wave interaction

Pantazopoulos, Petros Andreas; Stéfanou, N.; Almpanis, Evangelos; Papanikolaou, N.

doi:10.1103/physrevb.96.104425

Cited by 42 publications

(40 citation statements)

References 46 publications

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“…The structure in this geometry, with the magnetic field parallel to the surface and also perpendicular to the propagation direction, remains invariant under reflection with respect to the plane of incidence. Consequently, contrary to the Faraday configuration studied in our previous work [18][19][20], the transverse magnetic (TM) and transverse electric (TE) polarization modes, i.e. modes with the electric field oscillating in and normal to the plane of incidence, respectively, are eigenmodes of the system.…”

Section: Structure Designmentioning

confidence: 61%

“…Under the action of the spin wave, the magnetic film and, consequently, the entire structure can be looked upon as a periodically driven system because the magnetization field, given by equation (2), induces a temporal perturbation [18]…”

Section: Theory For Layered Optomagnonic Structuresmentioning

confidence: 99%

“…However, since light is guided inside Bi:YIG, the introduction of realistic dissipative losses would result in significant decrease of the efficiency. To this end, optomagnonic cavities formed in a magnetic dielectric film bounded by two mirrors [17][18][19], or in a defect layer in a dual photonic-magnonic periodic layered structure [20], have also been investigated. However, the studies reported so far refer to the Faraday configuration, with out-of-plane magnetized films, where it is challenging to obtain two optical resonances in the required close proximity to each other.…”

Section: Introductionmentioning

confidence: 99%

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High-efficiency triple-resonant inelastic light scattering in planar optomagnonic cavities

et al. 2019

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Optomagnonic cavities have recently been emerging as promising candidates for implementing coherent photon-magnon interactions, for applications in quantum memories and devices, and next generation quantum networks. A key challenge in the design of such cavities is the attainment of high magnon-mediated optical-to-optical conversion efficiencies, which could, e.g., be exploited for efficient optical interfacing of superconducting qubits, as well as the practicality of the final designs, which ideally should be planar and amenable to on-chip integration. Here, on the basis of a novel time-Floquet scattering-matrix approach, we report on the design and optimization of a planar, multilayer optomagnonic cavity, incorporating a cerium-substituted yttrium iron garnet thin film, magnetized in-plane, and operating in the triple-resonant inelastic light scattering regime. This architecture allows for magnon-mediated optical-to-optical conversion efficiencies of about 5% under realistic conditions, which is orders of magnitude higher than that attained in alternative optomagnonic designs. Our results suggest a viable way forward for realizing practical information inter-conversion, with high efficiencies, between microwaves, strongly coupled to magnons, and optical photons, as well as a platform for fundamental studies of classical and quantum dynamics in magnetic solids and for the implementation of futuristic quantum devices.

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Section: Structure Designmentioning

confidence: 61%

Section: Theory For Layered Optomagnonic Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-efficiency triple-resonant inelastic light scattering in planar optomagnonic cavities

et al. 2019

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“…Phenomenologically, magnetooptical effects can be captured by ˜( ) t , the macroscopic dielectric tensor [32]. For a magnetized cubic crystal, the dielectric tensor ˜( ) t in the Cartesian basis can be written [16,17,33] as is responsible for the vector light shift (Faraday effect) and is the first order in the magnetization M . Here the M s stands for the saturation magnetization.…”

Section: Magnetic Quasi-vortices-optical Vortices Interactionmentioning

confidence: 99%

“…To overcome the weakness of the spin-light interaction, cavity optomagnonics has been investigated [10][11][12][13][14][15][16][17]. In cavity optomagnonics, the density of states of optical modes are engineered with an optical cavity to enhance spin-light interaction.…”

Section: Introductionmentioning

confidence: 99%

Orbital angular momentum conservation in Brillouin light scattering within a ferromagnetic sphere

et al. 2018

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Magnetostatic modes supported by a ferromagnetic sphere have been known as the Walker modes, each of which possesses an orbital angular momentum as well as a spin angular momentum along a static magnetic field. The Walker modes with non-zero orbital angular momenta exhibit topologically non-trivial spin textures, which we call magnetic quasi-vortices. Photons in optical whispering gallery modes supported by a dielectric sphere possess orbital and spin angular momenta forming optical vortices. Within a ferromagnetic, as well as dielectric, sphere, two forms of vortices interact in the process of Brillouin light scattering. We argue that in the scattering there is a selection rule that dictates the exchange of orbital angular momenta between the vortices. The selection rule is shown to be responsible for the experimentally observed nonreciprocal Brillouin light scattering.

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Stationary Entanglement between Light and Microwave via Ferromagnetic Magnons

2020

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It is shown how to generate stationary entanglement between light and microwave in a hybrid opto-electro-magnonical system which mainly consists of a microwave cavity, a yttrium iron garnet (YIG) sphere, and a nanofiber. The optical modes in nanofiber can evanescently be coupled to whispering gallery modes, that are able to interact with magnon mode via spin-orbit interaction, in YIG sphere, while the microwave cavity photons and magnons are coupled through magnetic dipole interaction simultaneously. Under reasonable parameter regimes, pretty amount of entanglement can be generated, and it also shows persistence against temperature. The present work is expected to provide a new perspective for building more advanced and comprehensive quantum networks along with magnons for fast-developing quantum technologies and for studying the macroscopic quantum phenomena.

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Photomagnonic nanocavities for strong light–spin-wave interaction

Cited by 42 publications

References 46 publications

High-efficiency triple-resonant inelastic light scattering in planar optomagnonic cavities

High-efficiency triple-resonant inelastic light scattering in planar optomagnonic cavities

Orbital angular momentum conservation in Brillouin light scattering within a ferromagnetic sphere

Stationary Entanglement between Light and Microwave via Ferromagnetic Magnons

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