9:30 AM - 9:45 AM
▲ [13a-C302-2] Multi Fano Resonances in Optical Metamaterial
Keywords:Metamaterials, Fano resonance, Plasmonics
Metamaterials are artificial electromagnetic materials composed of subwavelength metal structures, which have attracted a great attention due to a capability of controlling of electromagnetic waves in ultra-thin size. Fano resonance (FR) generation in metamaterials has the large number of potential applications in the development of sensors, filters, lasing and electro-optics. An asymmetric double bar structure which is a pair of metal bars with slightly difference lengths has been studied for obtaining high quality factor resonances in the optical spectral range. In this study, we expand it to demonstrate FR in the schematic of not only metallic rods but also metallic slits using Babinet principle. In addition, the metamaterial of the asymmetric triple nanoslits having multi FR characteristic is proposed. The proposed metamaterial shows multi FR based on the selective FR coupling in each pair of nanoslit, and that makes dipole resonance, the first FR, and the second FR. In-phase resonance in all triple slits is present in the peak of the dipole resonance. The dipole resonance and each FR in the proposed scheme have different sensitivities in optical region. The structure has advantage of plasmonic sensor having high sensitivity in optical metamaterial.