Artificial localized magnon resonances in subwavelength meta-particles

Dmitry Filonov, Andrey Shmidt, Amir Boag, Pavel Ginzburg

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The interaction between electromagnetic waves and objects is strongly affected by the shape and material composition of the latter. Artificially created materials, formed by a subwavelength structuring of their unit cells, namely metamaterials, can exhibit peculiar responses to electromagnetic radiation and provide additional powerful degrees of freedom to the scatterer design. In particular, negative material susceptibilities give rise to strong resonant interactions with deeply subwavelength particles. While the negative electrical permittivity of natural noble metals manifests itself in localized plasmon resonant oscillations, negative magnetic permeability materials are rare in nature. Here, the concept of artificial magnon resonance in subwavelength objects with effective negative permeability, designed via the metamaterial approach, is demonstrated. Strong localized oscillations of the magnetic fields within an array of split ring resonators, forming a sphere, hybridize in a collective mode of the structure. As a result, a high scattering cross section, exceeding that of a steel sphere with the same radius by four orders of magnitude, was demonstrated. Scatterers, based on tunable resonances within artificially created materials, can find use in a broad range of electromagnetic applications, including wireless communications, radars, RFID, internet of things hardware, and many others.

Original languageEnglish
Article number123505
JournalApplied Physics Letters
Volume113
Issue number12
DOIs
StatePublished - 17 Sep 2018

Funding

FundersFunder number
United States-Israel Binational Science Foundation2016059
PAZY Foundation

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