Perfect transmission of spin waves in a one-dimensional magnonic quasicrystal

Hsueh, Wen–Jeng; Chen, C.H.; Qiu, R.Z.

doi:10.1016/j.physleta.2013.03.037

Cited by 13 publications

(10 citation statements)

References 63 publications

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“…For spin waves of longer wavelength, the same magnonic crystal will represent an effectively continuous medium with properties defined not only by those of the constituent magnetic materials but also details of the geometrical and micromagnetic structure. Magnonic crystals therefore represent a class of metamaterials, often referred to as "magnonic metamaterials", [73][74][75][76][77][78] which also includes systems that are not periodic, such as magnonic quasi-crystals [79][80][81][82][83][84][85] and (when considered from the point of view of their dynamic properties) magnetic composites. [86][87][88][89][90][91][92][93] The nature of the interlayer magnetization boundary conditions has crucial consequences for the scattering of spin waves from interfaces between regions with different magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Kruglyak¹,

Davies²,

Tkachenko³

et al. 2017

J. Phys. D: Appl. Phys.

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We report a theoretical study of the spin-wave band spectrum of magnonic crystals formed by stacking thin-film magnetic layers, with general assumptions about the properties of the interfaces between the layers. The use of the Barnaś-Mills magnetization boundary conditions has enabled us to systematically trace the origin of the magnonic band gaps in the spin-wave spectrum of such systems. We find that the band gaps are a ubiquitous attribute of a weakened interlayer coupling and a finite interface anisotropy (pinning). The band gaps in such systems represent a legacy of the discrete spinwave spectrum of the individual magnetic layers periodically stacked to form the magnonic crystal rather than result from Bragg scattering. At the same time, magnonic crystals with band gaps due to the Bragg scattering can be described by natural boundary conditions (i.e. those maintaining continuity of the magnetization direction across the whole sample). We generalize our conclusions to systems beyond thin-film magnonic crystals and propose magnonic crystals based on the ideas of graded-index magnonics and those formed by Fano resonances as a possible way to circumvent the discovered issues.

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Section: Introductionmentioning

confidence: 99%

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Kruglyak¹,

Davies²,

Tkachenko³

et al. 2017

J. Phys. D: Appl. Phys.

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“…Indeed, such spatially localized symmetries can be intrinsic in complex physical systems like large molecules [4,5], quasicrystals [6][7][8], or even in partially disordered matter [9]. Furthermore, since technological advances often require tailored structures suitable for corresponding applications, local symmetries can be present by design in multilayered photonic devices [10][11][12], semiconductor superlattices [13] and magnonic systems [14]. Acoustic [15][16][17] and phononic [18][19][20] structures have attracted increasing interest in this direction.…”

Section: Introductionmentioning

confidence: 99%

Invariant currents in lossy acoustic waveguides with complete local symmetry

et al. 2015

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We study the effect of discrete symmetry breaking in inhomogeneous scattering media within the framework of generic wave propagation. Our focus is on one-dimensional scattering potentials exhibiting local symmetries. We find a class of spatially invariant nonlocal currents, emerging when the corresponding generalized potential exhibits symmetries in arbitrary spatial domains. These invariants characterize the wave propagation and provide a spatial mapping of the wave function between any symmetry related domains. This generalizes the Bloch and parity theorems for broken reflection and translational symmetries, respectively. Their nonvanishing values indicate the symmetry breaking, whereas a zero value denotes the restoration of the global symmetry where the well-known forms of the two theorems are recovered. These invariants allow for a systematic treatment of systems with any local symmetry combination, providing a tool for the investigation of

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“…Transmission properties and their control in inhomogeneous media with complex geometric structure has developed into a field of intense study with applications to electronic [1][2][3], photonic [4][5][6], acoustic [7] and magnonic [8] systems. Aperiodic systems possess a central role both in understanding the fundamental concepts which govern the transitions from perfectly periodic order to randomness, and in the development and design of devices with controllable transport properties.…”

Section: Introductionmentioning

confidence: 99%

Local symmetries and perfect transmission in aperiodic photonic multilayers

et al. 2013

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We develop a classification of perfectly transmitting resonances occurring in effectively one-dimensional optical media which are decomposable into locally reflection symmetric parts. The local symmetries of the medium are shown to yield piecewise translation-invariant quantities, which are used to distinguish resonances with arbitrary field profile from resonances following the medium symmetries. Focusing on light scattering in aperiodic multilayer structures, we demonstrate this classification for representative setups, providing insight into the origin of perfect transmission. We further show how local symmetries can be utilized for the design of optical devices with perfect transmission at prescribed energies. Providing a link between resonant scattering and local symmetries of the underlying medium, the proposed approach may contribute to the understanding of optical response in complex systems

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Perfect transmission of spin waves in a one-dimensional magnonic quasicrystal

Cited by 13 publications

References 63 publications

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Formation of the band spectrum of spin waves in 1D magnonic crystals with different types of interfacial boundary conditions

Invariant currents in lossy acoustic waveguides with complete local symmetry

Local symmetries and perfect transmission in aperiodic photonic multilayers

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