An all-dielectric metasurface electromagnetically induced transparent resonator device
A technology of electromagnetically induced transparent and resonant devices, applied in the field of metamaterials, can solve the problems of large loss of metal structures and inability to produce high transmittance, and achieve the effects of low precision requirements, great practical value, and convenient processing
Active Publication Date: 2019-11-29
CHINA JILIANG UNIV
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Problems solved by technology
However, the loss of the metal structure is large, and it is impossible to produce EIT-like resonance with high transmittance and high quality factor (Q value).
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[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0024] Such as Figure 1 to Figure 4 As shown, the all-dielectric metasurface electromagnetically induced transparent resonance device of the present invention includes a substrate 2 and a dielectric resonator unit 1 located on the surface of the substrate in a two-dimensional periodic distribution. The substrate 2 is made of a dielectric material, and the dielectric constant of the substrate 2 is greater than 0 and Less than or equal to 4. The dielectric constant of the dielectric resonance unit 1 is greater than or equal to 6. The dielectric resonance unit 1 is composed of an upper transverse part 11, a middle transverse part 13, a lower transverse part 15, an upper longitudinal part 12 and a lower longitudinal part 14. The upper transverse part 11, the middle transverse part 13 and the lower transverse part 15 are parallel to each other. 12 and the lower...
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The invention discloses an all-dielectric super surface electromagnetically-induced transparent resonance device. A substrate is made of a dielectric material and a dielectric constant is greater than0 and less than or equal to 4; and the dielectric constant of a dielectric resonator unit is greater than or equal to 6. The dielectric resonator unit consists of an upper transverse part, a middle transverse part, a lower transverse part, an upper longitudinal part, and a lower longitudinal part; the upper transverse part, the middle transverse part, and the lower transverse part are parallel toeach other; the upper longitudinal part and the lower longitudinal part are parallel to each other; and the upper transverse part, the middle transverse part, and the lower transverse part are perpendicular to the upper longitudinal part and the lower longitudinal part respectively. The corner of the combination part between one end of the upper transverse part and one end of the upper longitudinal part is at an angle of 90 degrees; the corner of the combination part between the other end of the upper transverse part and one end of the middle transverse part is at an angle of 90 degrees; thecorner of the combination part between the other end of the middle transverse part and one end of the lower longitudinal part is at an angle of 90 degrees; and the corner of the combination part between the other end of the lower longitudinal part and one end of the lower transverse part is at an angle of 90 degrees. The upper transverse part and the lower transverse part have different lengths. According to the invention, the similar electromagnetically-induced transparent resonance with the high Q value and high peak transmittance can be generated and the all-dielectric super surface electromagnetically-induced transparent resonance device can be applied to the slow wave effect, nonlinear effect and sensing application.
Description
technical field [0001] The invention relates to an all-dielectric metasurface electromagnetically induced transparent (EIT-like) resonance device, belonging to the technical field of metamaterials. Background technique [0002] Electromagnetically induced transparency (EIT) arises from energy-level interference in polyatomic systems. The metamaterial-like EIT effect refers to a phenomenon similar to EIT that a narrow transmission peak appears in a wide stop band through metamaterials. Among them, the destructive interference will cause a strong dispersion effect, resulting in a high group refractive index and realizing the slow light effect. The EIT-like resonance with high quality factor can be applied to low-loss slow-light devices and high-sensitivity optical sensors, and opens up a new direction for the research of nonlinear optics. [0003] Traditional EIT-like metamaterials are all constructed of metal resonant structures based on Fano resonance. That is, two resona...
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IPC IPC(8): H01P7/10
CPCH01P7/10
Inventor 刘建军隋传帅洪治
Owner CHINA JILIANG UNIV