NUMERICAL ANALYSIS OF ENHANCED TRANSMISSION THROUGH A SINGLE SUBWAVELENGTH APERTURE BASED ON MIE RESONANCE SINGLE PARTICLE
Author(s) -
Lei Kang,
Véronique Sadaune,
Didier Lippens
Publication year - 2011
Publication title -
electromagnetic waves
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 89
eISSN - 1559-8985
pISSN - 1070-4698
DOI - 10.2528/pier10122705
Subject(s) - resonance (particle physics) , transmission (telecommunications) , particle (ecology) , aperture (computer memory) , optics , mie scattering , numerical aperture , physics , materials science , computer science , telecommunications , wavelength , light scattering , acoustics , scattering , geology , atomic physics , oceanography
We numerically demonstrate that the transmission through a deep subwavelength (‚0/20) aperture in a metal plate could be greatly enhanced owing to the resonance efiects of a high permittivity (•) dielectric cube tightly coupled to the aperture. The transmission enhancement originates from the conflnement and re- radiation of the electromagnetic energy impinging onto the high • cube which operates in the 1st Mie resonance mode, and behaves as an ultra-small magnetic dipole antenna. The complex permittivity of the cube governs the operating frequency and the enhancement in terms of bandwidth and transmissivity maximum. Additionally, based on the isotropic response of the highcube with dimensions comparable to the aperture size, the almost independence of the enhancement properties on the illumination polarization and incidence angle was assessed.
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