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Abstract The optical properties of four triatomic all-dielectric metamaterial structures composed of TiO2 media are investigated numerically. Two symmetrical metamaterial structures with dark-bright-dark coupling mode and bright-dark-bright coupling mode can… Click to show full abstract
Abstract The optical properties of four triatomic all-dielectric metamaterial structures composed of TiO2 media are investigated numerically. Two symmetrical metamaterial structures with dark-bright-dark coupling mode and bright-dark-bright coupling mode can enhance and cancel the original single EIT transparent window, respectively. And double EIT transparent windows were observed in the other two asymmetric structures with the bright-bright-dark and dark-dark-bright constructions. This means that the EIT effect can be controlled by the changing the near-field multimode coupling mode of the all-dielectric metamaterials. It provides a new method for the design of EIT metamaterial structures in the THz frequency band.
Journal Title: Optik
Year Published: 2020
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