Abstract
An analog of electromagnetically induced absorption is studied in a multilayer metamaterial composed of a similar double structure. The structure is designed by distributing metal rings with different radii between dielectric layers by using the finite integral time domain and effective medium method. The proposed structure exhibits near perfect narrow-band and wideband absorption, which is caused by a bright mode coupled with a dark mode. The absorption mechanism is determined from the current surface and electric field distributions at certain frequencies. The absorption of the structure is greatly influenced when the angle of incidence increases from 0° to 85°. This result can be achieved by angle or frequency select switches. The designed structure is sensitive to the surrounding refractive index, which can be applied as an environment monitor.
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