An all-dielectric hyper-surface electromagnetically induced transparent resonance device

Abstract

The invention discloses an all-dielectric super-surface electromagnetically induced transparent resonance device, comprising a substrate and a two-dimensional periodically distributed S-like dielectric resonance unit located on the surface of the substrate. The substrate is made of a dielectric material, and the dielectric constant of the substrate is greater than 0 and less than or equal to 5; S-like dielectric resonance unit consist of upper transverse part, upper longitudinal part, middle transverse part, lower longitudinal part and low transverse part, and that rotation angle of each connection part is 90 degrees, the upper transverse part, the middle transverse part, the lower transverse part are parallel to each other, and the upper longitudinal part and the lower longitudinal part are parallel to each other; the spacing between the upper and middle transverse parts is not equal to the spacing between the middle and lower transverse parts. The dielectric constant of the S-like dielectric resonant cell is equal to or greater than 6. The invention not only can realize high transmittance and high quality factor resonance, but also can improve group refractive index and realize slow light effect. In addition, the invention has robustness, that is, when the structural parameters of the resonant device are changed in a certain range, the EIT-like result is not affected, and compared with other electromagnetically induced transparent resonant devices, the advantage will be beneficial to device processing and engineering application.

Description

technical field [0001] The invention relates to an all-dielectric metasurface-like electromagnetically induced transparency (EIT-like) resonance device, belonging to the technical field of metamaterials. Background technique [0002] Electromagnetically induced transparency (EIT) is a quantum interference effect in an atomic three-level system, which produces a sharp transparent window in a broad absorption spectrum. The EIT-like effect of metamaterials refers to the phenomenon of electromagnetically induced transparency through mutual interference and destructive interaction between bright mode and dark mode resonance in the metamaterial structure. In recent years, metasurface-like electromagnetically induced transparency has become the focus in the field of nanophotonics due to its ability to generate resonances with high quality factors. Metamaterial resonators with high quality factors can be used in high-sensitivity sensing, narrow-band filtering, electromagnetic wave ...

AI Technical Summary

Problems solved by technology

[0003] Although some all-dielectric metasurfaces can realize high-quality factor-like electromagnetically induced transparency effects, when the structural parameters of metasurface resonator devices change, the sensitivity of the resonant frequencies of the bright mode and dark mode to parameter changes is often inconsistent, causing both Large detuning between, so that the EIT-like effect disappears

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