Abstract

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 [1], [2]. An asymmetric double bar (ADB) structure which is a pair of metal bars with slightly difference lengths has been studied for obtaining high quality factor (Q-factor) resonances in the optical spectral range [3]. 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, we analyze multi FR in asymmetric triple bars and slits to achieve high sensitivity in optical region.

© 2016 Japan Society of Applied Physics, Optical Society of America