High-quality trapped modes in all-dielectric metamaterials

Abstract

A planar all-dielectric metamaterial made of a double-periodic lattice whose unit cell consists of a single subwavelength dielectric particle having the form of a disk possessing a penetrating hole is considered. The resonant states in the transmitted spectra of the metamaterial are identified considering modes inherent to the individual cylindrical dielectric resonator. A correlation between the asymmetry in particle's geometry, which arises from the off-centered displacement of the hole, and formation of the Mie-type and trapped modes is established. The advantages of using a coaxial-sector notch instead of a round hole for the trapped mode excitation are explained.

12 pages, 7 figues

References in corpus (2)

• High-efficiency light-wave control with all-dielectric optical Huygens' metasurfaces
• Magnetic field concentration with coaxial silicon nanocylinders in optical spectral range

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